यदि (x+y=15) और (2x-3y=10), तो (3x+y) का मान क्या है?

If (x+y=15) and (2x-3y=10), what is the value of (3x+y)?

Explanation opens after your attempt
Correct Answer

B. (37)

Step 1

Concept

Using (x=15-y) gives (30-5y=10), so (y=4) and (x=11). Hence (3x+y=37).

Step 2

Why this answer is correct

The correct answer is B. (37). Using (x=15-y) gives (30-5y=10), so (y=4) and (x=11). Hence (3x+y=37).

Step 3

Exam Tip

(x=15-y) रखने पर (30-5y=10), इसलिए (y=4) और (x=11)। अतः (3x+y=37)।

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Mathematics Answer, Explanation and Revision Hints

यदि (x+y=15) और (2x-3y=10), तो (3x+y) का मान क्या है? / If (x+y=15) and (2x-3y=10), what is the value of (3x+y)?

Correct Answer: B. (37). Explanation: (x=15-y) रखने पर (30-5y=10), इसलिए (y=4) और (x=11)। अतः (3x+y=37)। / Using (x=15-y) gives (30-5y=10), so (y=4) and (x=11). Hence (3x+y=37).

Which concept should I revise for this Mathematics MCQ?

Using (x=15-y) gives (30-5y=10), so (y=4) and (x=11). Hence (3x+y=37).

What exam hint can help solve this Mathematics question?

(x=15-y) रखने पर (30-5y=10), इसलिए (y=4) और (x=11)। अतः (3x+y=37)।