समीकरणों (4x+5y=39) और (2x-y=9) का हल कौन-सा है?

Which is the solution of (4x+5y=39) and (2x-y=9)?

Explanation opens after your attempt
Correct Answer

A. (x=6,\ y=3)

Step 1

Concept

Use (y=2x-9) from the second equation. Substitution gives (14x=84), so (x=6,\ y=3).

Step 2

Why this answer is correct

The correct answer is A. (x=6,\ y=3). Use (y=2x-9) from the second equation. Substitution gives (14x=84), so (x=6,\ y=3).

Step 3

Exam Tip

दूसरे समीकरण से (y=2x-9) रखें। पहले में रखने पर (14x=84), इसलिए (x=6,\ y=3)।

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समीकरणों (4x+5y=39) और (2x-y=9) का हल कौन-सा है? / Which is the solution of (4x+5y=39) and (2x-y=9)?

Correct Answer: A. (x=6,\ y=3). Explanation: दूसरे समीकरण से (y=2x-9) रखें। पहले में रखने पर (14x=84), इसलिए (x=6,\ y=3)। / Use (y=2x-9) from the second equation. Substitution gives (14x=84), so (x=6,\ y=3).

Which concept should I revise for this Mathematics MCQ?

Use (y=2x-9) from the second equation. Substitution gives (14x=84), so (x=6,\ y=3).

What exam hint can help solve this Mathematics question?

दूसरे समीकरण से (y=2x-9) रखें। पहले में रखने पर (14x=84), इसलिए (x=6,\ y=3)।