Concept-wise Practice

substitution MCQ Questions for Class 10

substitution se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

419 questions tagged with substitution.

समीकरणों (x-2y=1) और (x+y=10) में (y) का मान क्या है?

In the equations (x-2y=1) and (x+y=10), what is the value of (y)?

Explanation opens after your attempt
Correct Answer

B. (y=3)

Step 1

Concept

From the second equation (x=10-y); substituting gives (10-y-2y=1), so (y=3). Watch brackets and signs in substitution.

Step 2

Why this answer is correct

The correct answer is B. (y=3). From the second equation (x=10-y); substituting gives (10-y-2y=1), so (y=3). Watch brackets and signs in substitution.

Step 3

Exam Tip

दूसरे से (x=10-y); रखने पर (10-y-2y=1), इसलिए (y=3)। प्रतिस्थापन में कोष्ठक और चिन्ह ध्यान रखें।

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समीकरणों (x=3y-1) और (x+y=11) का हल क्या है?

What is the solution of (x=3y-1) and (x+y=11)?

Explanation opens after your attempt
Correct Answer

A. (x=8,\ y=3)

Step 1

Concept

Substituting (x=3y-1) gives (4y-1=11), so (y=3) and (x=8). Use the given expression for (x) directly.

Step 2

Why this answer is correct

The correct answer is A. (x=8,\ y=3). Substituting (x=3y-1) gives (4y-1=11), so (y=3) and (x=8). Use the given expression for (x) directly.

Step 3

Exam Tip

(x=3y-1) रखने पर (4y-1=11), इसलिए (y=3) और (x=8)। बने हुए (x) के रूप को सीधे इस्तेमाल करें।

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समीकरणों (x+4y=18) और (x=2) से (y) का मान ज्ञात कीजिए।

Find the value of (y) from (x+4y=18) and (x=2).

Explanation opens after your attempt
Correct Answer

B. (y=4)

Step 1

Concept

Putting (x=2) gives (2+4y=18), so (y=4). Do arithmetic carefully in simple substitution.

Step 2

Why this answer is correct

The correct answer is B. (y=4). Putting (x=2) gives (2+4y=18), so (y=4). Do arithmetic carefully in simple substitution.

Step 3

Exam Tip

(x=2) रखने पर (2+4y=18), इसलिए (y=4)। सरल प्रतिस्थापन में अंकगणित ध्यान से करें।

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समीकरणों (y=x+4) और (2x+y=10) में (x) का मान क्या होगा?

In (y=x+4) and (2x+y=10), what will be the value of (x)?

Explanation opens after your attempt
Correct Answer

B. (x=2)

Step 1

Concept

Substituting (y=x+4) gives (3x+4=10), so (x=2). Combine like terms after substitution.

Step 2

Why this answer is correct

The correct answer is B. (x=2). Substituting (y=x+4) gives (3x+4=10), so (x=2). Combine like terms after substitution.

Step 3

Exam Tip

(y=x+4) रखने पर (3x+4=10), इसलिए (x=2)। प्रतिस्थापन के बाद समान पदों को जोड़ें।

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यदि (x+y=12) और (x=7), तो (y) का मान क्या है?

If (x+y=12) and (x=7), what is the value of (y)?

Explanation opens after your attempt
Correct Answer

C. (y=5)

Step 1

Concept

Putting (x=7) gives (7+y=12), so (y=5). Use the given variable value directly.

Step 2

Why this answer is correct

The correct answer is C. (y=5). Putting (x=7) gives (7+y=12), so (y=5). Use the given variable value directly.

Step 3

Exam Tip

(x=7) रखने पर (7+y=12), इसलिए (y=5)। दिए हुए चर का मान सीधे प्रयोग करें।

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यदि (x=5-y) और (2x+y=8), तो (y) का मान क्या होगा?

If (x=5-y) and (2x+y=8), what will be the value of (y)?

Explanation opens after your attempt
Correct Answer

B. (y=2)

Step 1

Concept

Substituting (x=5-y) gives (10-2y+y=8), so (y=2). Be careful while simplifying negative signs.

Step 2

Why this answer is correct

The correct answer is B. (y=2). Substituting (x=5-y) gives (10-2y+y=8), so (y=2). Be careful while simplifying negative signs.

Step 3

Exam Tip

(x=5-y) रखने पर (10-2y+y=8), इसलिए (y=2)। ऋण चिन्हों को सरल करते समय सावधानी रखें।

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समीकरणों (x+y=5) और (2x+3y=12) का हल क्या है?

What is the solution of (x+y=5) and (2x+3y=12)?

Explanation opens after your attempt
Correct Answer

B. (x=3,\ y=2)

Step 1

Concept

Using (x=5-y) gives (10-2y+3y=12), so (y=2) and (x=3). It is better to isolate a variable from the simpler equation.

Step 2

Why this answer is correct

The correct answer is B. (x=3,\ y=2). Using (x=5-y) gives (10-2y+3y=12), so (y=2) and (x=3). It is better to isolate a variable from the simpler equation.

Step 3

Exam Tip

(x=5-y) रखने पर (10-2y+3y=12), इसलिए (y=2) और (x=3)। सरल समीकरण से चर अलग करना बेहतर है।

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यदि (x+2y=11) और (x-y=2), तो (x) और (y) का मान क्या है?

If (x+2y=11) and (x-y=2), what are the values of (x) and (y)?

Explanation opens after your attempt
Correct Answer

C. (x=5,\ y=3)

Step 1

Concept

From the second equation (x=y+2); substituting gives (3y+2=11), so (y=3) and (x=5). Substitute the isolated variable carefully.

Step 2

Why this answer is correct

The correct answer is C. (x=5,\ y=3). From the second equation (x=y+2); substituting gives (3y+2=11), so (y=3) and (x=5). Substitute the isolated variable carefully.

Step 3

Exam Tip

दूसरे समीकरण से (x=y+2); रखने पर (3y+2=11), इसलिए (y=3) और (x=5)। अलग किए हुए चर को ध्यान से रखें।

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यदि (y=3x) और (x+y=8), तो हल क्या है?

If (y=3x) and (x+y=8), what is the solution?

Explanation opens after your attempt
Correct Answer

A. (x=2,\ y=6)

Step 1

Concept

Substituting (y=3x) gives (4x=8), so (x=2) and (y=6). Substitution is easiest when one variable is already expressed as a multiple.

Step 2

Why this answer is correct

The correct answer is A. (x=2,\ y=6). Substituting (y=3x) gives (4x=8), so (x=2) and (y=6). Substitution is easiest when one variable is already expressed as a multiple.

Step 3

Exam Tip

(y=3x) को रखने पर (4x=8), इसलिए (x=2) और (y=6)। अनुपात वाले रूप में प्रतिस्थापन सबसे सरल होता है।

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यदि (x=2y) और (x+y=9), तो (x) का मान क्या है?

If (x=2y) and (x+y=9), what is the value of (x)?

Explanation opens after your attempt
Correct Answer

B. (x=6)

Step 1

Concept

Using (x=2y) gives (2y+y=9), so (y=3) and (x=6). In substitution, form an equation in one variable.

Step 2

Why this answer is correct

The correct answer is B. (x=6). Using (x=2y) gives (2y+y=9), so (y=3) and (x=6). In substitution, form an equation in one variable.

Step 3

Exam Tip

(x=2y) रखने पर (2y+y=9), इसलिए (y=3) और (x=6)। प्रतिस्थापन में एक ही चर वाला समीकरण बनाइए।

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यदि (y=x+1) और (x+y=7), तो (x) और (y) के मान क्या होंगे?

If (y=x+1) and (x+y=7), what are the values of (x) and (y)?

Explanation opens after your attempt
Correct Answer

B. (x=3,\ y=4)

Step 1

Concept

Substituting (y=x+1) in (x+y=7) gives (2x+1=7), so (x=3) and (y=4). Use the already isolated variable in exams.

Step 2

Why this answer is correct

The correct answer is B. (x=3,\ y=4). Substituting (y=x+1) in (x+y=7) gives (2x+1=7), so (x=3) and (y=4). Use the already isolated variable in exams.

Step 3

Exam Tip

(y=x+1) को (x+y=7) में रखने पर (2x+1=7), इसलिए (x=3) और (y=4)। परीक्षा में बने हुए रूप का उपयोग करें।

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समीकरणों (2x+y=7) और (x=2) में (y) का मान क्या है?

In the equations (2x+y=7) and (x=2), what is the value of (y)?

Explanation opens after your attempt
Correct Answer

C. (y=3)

Step 1

Concept

Putting (x=2) gives (4+y=7), so (y=3). In substitution, place the given value directly.

Step 2

Why this answer is correct

The correct answer is C. (y=3). Putting (x=2) gives (4+y=7), so (y=3). In substitution, place the given value directly.

Step 3

Exam Tip

(x=2) रखने पर (4+y=7), इसलिए (y=3)। प्रतिस्थापन विधि में दिए मान को सीधे रखें।

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समीकरणों (x+y=5) और (x-y=1) का हल क्या है?

What is the solution of the equations (x+y=5) and (x-y=1)?

Explanation opens after your attempt
Correct Answer

A. (x=3,\ y=2)

Step 1

Concept

Adding both equations gives (2x=6), so (x=3) and (y=2). In exams, add first when one variable cancels easily.

Step 2

Why this answer is correct

The correct answer is A. (x=3,\ y=2). Adding both equations gives (2x=6), so (x=3) and (y=2). In exams, add first when one variable cancels easily.

Step 3

Exam Tip

दोनों समीकरण जोड़ने पर (2x=6), इसलिए (x=3) और (y=2)। परीक्षा में पहले जोड़कर आसान चर निकालें।

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ग्राफ में (6x+y=38) और (3x-2y=-1) का समाधान कौन सा है?

What is the solution of (6x+y=38) and (3x-2y=-1) on the graph?

Explanation opens after your attempt
Correct Answer

A. ((5,8))

Step 1

Concept

From the first equation, (y=38-6x). Substituting gives (3x-2(38-6x)=-1), so (x=5), (y=8). This is the graph intersection.

Step 2

Why this answer is correct

The correct answer is A. ((5,8)). From the first equation, (y=38-6x). Substituting gives (3x-2(38-6x)=-1), so (x=5), (y=8). This is the graph intersection.

Step 3

Exam Tip

पहले से (y=38-6x), दूसरे में रखने पर (3x-2(38-6x)=-1), इसलिए (x=5), (y=8)। यही ग्राफ का प्रतिच्छेद है।

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ग्राफ में (8x+y=43) और (2x-3y=-5) के प्रतिच्छेद का (y)-निर्देशांक क्या है?

What is the (y)-coordinate of the intersection of (8x+y=43) and (2x-3y=-5)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

From the first equation, (y=43-8x). Substituting gives (2x-3(43-8x)=-5), so (x=5) and (y=3). Hence the (y)-coordinate is (3).

Step 2

Why this answer is correct

The correct answer is B. (3). From the first equation, (y=43-8x). Substituting gives (2x-3(43-8x)=-5), so (x=5) and (y=3). Hence the (y)-coordinate is (3).

Step 3

Exam Tip

पहले से (y=43-8x), रखने पर (2x-3(43-8x)=-5), इसलिए (x=5) और (y=3)। अतः (y)-निर्देशांक (3) है।

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रेखाएं (3x+2y=25) और (x-3y=-11) ग्राफ पर किस बिंदु पर मिलती हैं?

At which point do (3x+2y=25) and (x-3y=-11) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. ((5,5))

Step 1

Concept

From the second equation, (x=3y-11). Substituting gives (9y-33+2y=25), so (y=5). Then (x=5), so the intersection is ((5,5)).

Step 2

Why this answer is correct

The correct answer is A. ((5,5)). From the second equation, (x=3y-11). Substituting gives (9y-33+2y=25), so (y=5). Then (x=5), so the intersection is ((5,5)).

Step 3

Exam Tip

दूसरे से (x=3y-11), पहले में रखने पर (9y-33+2y=25), इसलिए (y=5)। फिर (x=5), अतः प्रतिच्छेद ((5,5)) है।

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ग्राफ पर (4x-y=13) और (x+2y=14) का समाधान कौन सा है?

What is the solution of (4x-y=13) and (x+2y=14) on the graph?

Explanation opens after your attempt
Correct Answer

A. ((4,3))

Step 1

Concept

From the first equation, (y=4x-13). Substituting gives (x+2(4x-13)=14), so (x=4) and (y=3). The intersection point is the graphical solution.

Step 2

Why this answer is correct

The correct answer is A. ((4,3)). From the first equation, (y=4x-13). Substituting gives (x+2(4x-13)=14), so (x=4) and (y=3). The intersection point is the graphical solution.

Step 3

Exam Tip

पहले से (y=4x-13), दूसरे में रखने पर (x+2(4x-13)=14), इसलिए (x=4) और (y=3)। प्रतिच्छेद बिंदु ही ग्राफीय हल है।

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रेखाएं (7x-y=20) और (x+3y=12) का सही प्रतिच्छेद क्या है?

What is the correct intersection of (7x-y=20) and (x+3y=12)?

Explanation opens after your attempt
Correct Answer

B. (\left\(\frac{36}{11},\frac{32}{11}\right\))

Step 1

Concept

Putting (y=7x-20) in (x+3y=12) gives (22x=72), so \(x=\frac{36}{11}\) and \(y=\frac{32}{11}\). Fractional coordinates can also be correct graphical solutions.

Step 2

Why this answer is correct

The correct answer is B. (\left\(\frac{36}{11},\frac{32}{11}\right\)). Putting (y=7x-20) in (x+3y=12) gives (22x=72), so \(x=\frac{36}{11}\) and \(y=\frac{32}{11}\). Fractional coordinates can also be correct graphical solutions.

Step 3

Exam Tip

(y=7x-20) को (x+3y=12) में रखने पर (22x=72), इसलिए \(x=\frac{36}{11}\) और \(y=\frac{32}{11}\)। भिन्न निर्देशांक भी सही ग्राफीय समाधान हो सकते हैं।

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रेखाएं (6x+5y=39) और (4x-y=9) के प्रतिच्छेद का (x)-निर्देशांक क्या है?

What is the (x)-coordinate of the intersection of (6x+5y=39) and (4x-y=9)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

From the second equation, (y=4x-9). Substituting gives (6x+5(4x-9)=39), so (x=3). The graph intersection gives this (x)-coordinate.

Step 2

Why this answer is correct

The correct answer is B. (3). From the second equation, (y=4x-9). Substituting gives (6x+5(4x-9)=39), so (x=3). The graph intersection gives this (x)-coordinate.

Step 3

Exam Tip

दूसरे से (y=4x-9), रखने पर (6x+5(4x-9)=39), इसलिए (x=3)। ग्राफ का प्रतिच्छेद यही (x)-निर्देशांक देता है।

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रेखाएं (5x+2y=24) और (x-y=3) ग्राफ पर किस बिंदु पर मिलेंगी?

At which point will the lines (5x+2y=24) and (x-y=3) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. ((6,3))

Step 1

Concept

From (x-y=3), (y=x-3); substituting gives (7x-6=24) and (x=6). Thus (y=3), so the intersection is ((6,3)).

Step 2

Why this answer is correct

The correct answer is A. ((6,3)). From (x-y=3), (y=x-3); substituting gives (7x-6=24) and (x=6). Thus (y=3), so the intersection is ((6,3)).

Step 3

Exam Tip

(x-y=3) से (y=x-3), रखने पर (7x-6=24) और (x=6)। इसलिए (y=3), अतः प्रतिच्छेद ((6,3)) है।

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रेखाएं (5x+2y=23) और (x-3y=-4) ग्राफ पर किस बिंदु पर मिलेंगी?

At which point will the lines (5x+2y=23) and (x-3y=-4) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. (\left\(\frac{61}{17},\frac{43}{17}\right\))

Step 1

Concept

Putting (x=3y-4) gives (5(3y-4)+2y=23), so \(y=\frac{43}{17}\) and \(x=\frac{61}{17}\). Fractional coordinates can also be correct graphical solutions.

Step 2

Why this answer is correct

The correct answer is A. (\left\(\frac{61}{17},\frac{43}{17}\right\)). Putting (x=3y-4) gives (5(3y-4)+2y=23), so \(y=\frac{43}{17}\) and \(x=\frac{61}{17}\). Fractional coordinates can also be correct graphical solutions.

Step 3

Exam Tip

(x=3y-4) रखने पर (5(3y-4)+2y=23), इसलिए \(y=\frac{43}{17}\) और \(x=\frac{61}{17}\)। भिन्न निर्देशांक भी सही ग्राफीय समाधान हो सकते हैं।

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ग्राफ में (5x+y=27) और (2x-3y=-6) का समाधान कौन सा है?

What is the solution of (5x+y=27) and (2x-3y=-6) on the graph?

Explanation opens after your attempt
Correct Answer

A. ((5,2))

Step 1

Concept

From the first equation, (y=27-5x). Substituting gives (2x-3(27-5x)=-6), so (x=5), (y=2). This is the graph intersection.

Step 2

Why this answer is correct

The correct answer is A. ((5,2)). From the first equation, (y=27-5x). Substituting gives (2x-3(27-5x)=-6), so (x=5), (y=2). This is the graph intersection.

Step 3

Exam Tip

पहले से (y=27-5x), दूसरे में रखने पर (2x-3(27-5x)=-6), इसलिए (x=5), (y=2)। यही ग्राफ का प्रतिच्छेद है।

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रेखाएं (2x+y=16) और (x-2y=-8) ग्राफ पर किस बिंदु पर मिलती हैं?

At which point do (2x+y=16) and (x-2y=-8) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. ((4,8))

Step 1

Concept

From the first equation, (y=16-2x). Substituting gives (x-2(16-2x)=-8), so (x=4). Then (y=8).

Step 2

Why this answer is correct

The correct answer is A. ((4,8)). From the first equation, (y=16-2x). Substituting gives (x-2(16-2x)=-8), so (x=4). Then (y=8).

Step 3

Exam Tip

पहले से (y=16-2x), दूसरे में रखने पर (x-2(16-2x)=-8), इसलिए (x=4)। फिर (y=8)।

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रेखाएं (6x-y=17) और (x+2y=9) का सही प्रतिच्छेद क्या है?

What is the correct intersection of (6x-y=17) and (x+2y=9)?

Explanation opens after your attempt
Correct Answer

A. (\left\(\frac{43}{13},\frac{37}{13}\right\))

Step 1

Concept

Putting (y=6x-17) in (x+2y=9) gives (13x=43), so \(x=\frac{43}{13}\) and \(y=\frac{37}{13}\). Fractional coordinates can also be correct graphical solutions.

Step 2

Why this answer is correct

The correct answer is A. (\left\(\frac{43}{13},\frac{37}{13}\right\)). Putting (y=6x-17) in (x+2y=9) gives (13x=43), so \(x=\frac{43}{13}\) and \(y=\frac{37}{13}\). Fractional coordinates can also be correct graphical solutions.

Step 3

Exam Tip

(y=6x-17) को (x+2y=9) में रखने पर (13x=43), इसलिए \(x=\frac{43}{13}\) और \(y=\frac{37}{13}\)। भिन्न निर्देशांक भी सही ग्राफीय समाधान हो सकते हैं।

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रेखाएं (3x+2y=18) और (x-y=1) ग्राफ पर किस बिंदु पर मिलेंगी?

At which point will the lines (3x+2y=18) and (x-y=1) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. ((4,3))

Step 1

Concept

From (x-y=1), (y=x-1); substituting gives (3x+2x-2=18) and (x=4). Thus (y=3), so the intersection is ((4,3)).

Step 2

Why this answer is correct

The correct answer is A. ((4,3)). From (x-y=1), (y=x-1); substituting gives (3x+2x-2=18) and (x=4). Thus (y=3), so the intersection is ((4,3)).

Step 3

Exam Tip

(x-y=1) से (y=x-1), रखने पर (3x+2x-2=18) और (x=4)। इसलिए (y=3), अतः प्रतिच्छेद ((4,3)) है।

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ग्राफ में (4x+y=19) और (x-2y=-7) का समाधान कौन सा है?

What is the solution of (4x+y=19) and (x-2y=-7) on the graph?

Explanation opens after your attempt
Correct Answer

A. ((3,7))

Step 1

Concept

From the first equation, (y=19-4x). Substituting gives (x-2(19-4x)=-7), so (x=3), (y=7). This is the graph intersection.

Step 2

Why this answer is correct

The correct answer is A. ((3,7)). From the first equation, (y=19-4x). Substituting gives (x-2(19-4x)=-7), so (x=3), (y=7). This is the graph intersection.

Step 3

Exam Tip

पहले से (y=19-4x), दूसरे में रखने पर (x-2(19-4x)=-7), इसलिए (x=3), (y=7)। यही ग्राफ का प्रतिच्छेद है।

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रेखाएं (x+y=11) और (2x-3y=-3) ग्राफ पर किस बिंदु पर मिलती हैं?

At which point do the lines (x+y=11) and (2x-3y=-3) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. ((6,5))

Step 1

Concept

Putting (y=11-x) gives (2x-3(11-x)=-3), so (5x=30) and (x=6). Then (y=5).

Step 2

Why this answer is correct

The correct answer is A. ((6,5)). Putting (y=11-x) gives (2x-3(11-x)=-3), so (5x=30) and (x=6). Then (y=5).

Step 3

Exam Tip

(y=11-x) रखने पर (2x-3(11-x)=-3), इसलिए (5x=30) और (x=6)। फिर (y=5)।

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ग्राफ पर (2x-y=6) और (x+2y=8) का समाधान कौन सा है?

What is the solution of (2x-y=6) and (x+2y=8) on the graph?

Explanation opens after your attempt
Correct Answer

A. ((4,2))

Step 1

Concept

From the first equation, (y=2x-6). Substituting gives (x+4x-12=8), so (x=4) and (y=2). The intersection point is the graphical solution.

Step 2

Why this answer is correct

The correct answer is A. ((4,2)). From the first equation, (y=2x-6). Substituting gives (x+4x-12=8), so (x=4) and (y=2). The intersection point is the graphical solution.

Step 3

Exam Tip

पहले से (y=2x-6), दूसरे में रखने पर (x+4x-12=8), इसलिए (x=4) और (y=2)। प्रतिच्छेद बिंदु ही ग्राफीय हल है।

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रेखाएँ (2x+7y=31) और (x-y=1) किस बिंदु पर मिलती हैं?

At which point do the lines (2x+7y=31) and (x-y=1) meet?

Explanation opens after your attempt
Correct Answer

A. बिंदु (\left\(\frac{38}{9},\frac{29}{9}\right\))Point (\left\(\frac{38}{9},\frac{29}{9}\right\))

Step 1

Concept

From (x-y=1), (x=y+1), and substituting in the first equation gives (9y=29). Hence \(y=\frac{29}{9}\) and \(x=\frac{38}{9}\).

Step 2

Why this answer is correct

The correct answer is A. बिंदु (\left\(\frac{38}{9},\frac{29}{9}\right\)) / Point (\left\(\frac{38}{9},\frac{29}{9}\right\)). From (x-y=1), (x=y+1), and substituting in the first equation gives (9y=29). Hence \(y=\frac{29}{9}\) and \(x=\frac{38}{9}\).

Step 3

Exam Tip

(x-y=1) से (x=y+1), और पहले समीकरण में रखने पर (9y=29)। इसलिए \(y=\frac{29}{9}\) और \(x=\frac{38}{9}\) है।

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यदि दो रेखाएँ (x+ay=11) और (3x-y=10) बिंदु (\left\(4,2\right\)) पर मिलती हैं, तो (a) का मान क्या है?

If two lines (x+ay=11) and (3x-y=10) meet at (\left\(4,2\right\)), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{7}{2}\)

Step 1

Concept

Putting (\left\(4,2\right\)) in (x+ay=11) gives (4+2a=11). Hence \(a=\frac{7}{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{7}{2}\). Putting (\left\(4,2\right\)) in (x+ay=11) gives (4+2a=11). Hence \(a=\frac{7}{2}\).

Step 3

Exam Tip

(\left\(4,2\right\)) को (x+ay=11) में रखने पर (4+2a=11)। इसलिए \(a=\frac{7}{2}\)।

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