यदि (6x-y=21) और (2x+3y=17), तो सही हल कौन-सा है?

If (6x-y=21) and (2x+3y=17), which is the correct solution?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

From the first equation use (y=6x-21). Substituting in the second gives (20x=80), so (x=4,\ y=3).

Step 2

Why this answer is correct

The correct answer is C. (x=4,\ y=3). From the first equation use (y=6x-21). Substituting in the second gives (20x=80), so (x=4,\ y=3).

Step 3

Exam Tip

पहले समीकरण से (y=6x-21) रखें। दूसरे में रखने पर (20x=80), इसलिए (x=4,\ y=3)।

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Mathematics Answer, Explanation and Revision Hints

यदि (6x-y=21) और (2x+3y=17), तो सही हल कौन-सा है? / If (6x-y=21) and (2x+3y=17), which is the correct solution?

Correct Answer: C. (x=4,\ y=3). Explanation: पहले समीकरण से (y=6x-21) रखें। दूसरे में रखने पर (20x=80), इसलिए (x=4,\ y=3)। / From the first equation use (y=6x-21). Substituting in the second gives (20x=80), so (x=4,\ y=3).

Which concept should I revise for this Mathematics MCQ?

From the first equation use (y=6x-21). Substituting in the second gives (20x=80), so (x=4,\ y=3).

What exam hint can help solve this Mathematics question?

पहले समीकरण से (y=6x-21) रखें। दूसरे में रखने पर (20x=80), इसलिए (x=4,\ y=3)।