यदि (x+y=12) और (2x-3y=9), तो (y) का मान क्या होगा?

If (x+y=12) and (2x-3y=9), what will be the value of (y)?

Explanation opens after your attempt
Correct Answer

B. (y=3)

Step 1

Concept

Using (x=12-y) gives (24-2y-3y=9). Thus (5y=15), so (y=3).

Step 2

Why this answer is correct

The correct answer is B. (y=3). Using (x=12-y) gives (24-2y-3y=9). Thus (5y=15), so (y=3).

Step 3

Exam Tip

(x=12-y) रखने पर (24-2y-3y=9) मिलता है। इससे (5y=15), इसलिए (y=3)।

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Mathematics Answer, Explanation and Revision Hints

यदि (x+y=12) और (2x-3y=9), तो (y) का मान क्या होगा? / If (x+y=12) and (2x-3y=9), what will be the value of (y)?

Correct Answer: B. (y=3). Explanation: (x=12-y) रखने पर (24-2y-3y=9) मिलता है। इससे (5y=15), इसलिए (y=3)। / Using (x=12-y) gives (24-2y-3y=9). Thus (5y=15), so (y=3).

Which concept should I revise for this Mathematics MCQ?

Using (x=12-y) gives (24-2y-3y=9). Thus (5y=15), so (y=3).

What exam hint can help solve this Mathematics question?

(x=12-y) रखने पर (24-2y-3y=9) मिलता है। इससे (5y=15), इसलिए (y=3)।