यदि (ax+2y=16) और (x+y=7) का हल (x=2,\ y=5) है, तो (a) का मान क्या होगा?

If (ax+2y=16) and (x+y=7) have solution (x=2,\ y=5), what will be the value of (a)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

Substituting (x=2,\ y=5) gives (2a+10=16). Therefore (a=3).

Step 2

Why this answer is correct

The correct answer is C. (3). Substituting (x=2,\ y=5) gives (2a+10=16). Therefore (a=3).

Step 3

Exam Tip

(x=2,\ y=5) रखने पर (2a+10=16) मिलता है। इसलिए (a=3)।

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Mathematics Answer, Explanation and Revision Hints

यदि (ax+2y=16) और (x+y=7) का हल (x=2,\ y=5) है, तो (a) का मान क्या होगा? / If (ax+2y=16) and (x+y=7) have solution (x=2,\ y=5), what will be the value of (a)?

Correct Answer: C. (3). Explanation: (x=2,\ y=5) रखने पर (2a+10=16) मिलता है। इसलिए (a=3)। / Substituting (x=2,\ y=5) gives (2a+10=16). Therefore (a=3).

Which concept should I revise for this Mathematics MCQ?

Substituting (x=2,\ y=5) gives (2a+10=16). Therefore (a=3).

What exam hint can help solve this Mathematics question?

(x=2,\ y=5) रखने पर (2a+10=16) मिलता है। इसलिए (a=3)।