यदि (4x+2y=20) और (x+y=7), तो (x) का मान क्या है?

If (4x+2y=20) and (x+y=7), what is the value of (x)?

Explanation opens after your attempt
Correct Answer

C. (x=3)

Step 1

Concept

The first equation becomes (2x+y=10); subtracting (x+y=7) gives (x=3). Divide by common factors first.

Step 2

Why this answer is correct

The correct answer is C. (x=3). The first equation becomes (2x+y=10); subtracting (x+y=7) gives (x=3). Divide by common factors first.

Step 3

Exam Tip

पहला समीकरण (2x+y=10) बनता है; इससे (x+y=7) घटाने पर (x=3)। पहले सामान्य गुणनखंड से भाग दें।

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Mathematics Answer, Explanation and Revision Hints

यदि (4x+2y=20) और (x+y=7), तो (x) का मान क्या है? / If (4x+2y=20) and (x+y=7), what is the value of (x)?

Correct Answer: C. (x=3). Explanation: पहला समीकरण (2x+y=10) बनता है; इससे (x+y=7) घटाने पर (x=3)। पहले सामान्य गुणनखंड से भाग दें। / The first equation becomes (2x+y=10); subtracting (x+y=7) gives (x=3). Divide by common factors first.

Which concept should I revise for this Mathematics MCQ?

The first equation becomes (2x+y=10); subtracting (x+y=7) gives (x=3). Divide by common factors first.

What exam hint can help solve this Mathematics question?

पहला समीकरण (2x+y=10) बनता है; इससे (x+y=7) घटाने पर (x=3)। पहले सामान्य गुणनखंड से भाग दें।

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