समीकरणों (7x-3y=20) और (2x+y=9) का हल कौन-सा है?

Which is the solution of (7x-3y=20) and (2x+y=9)?

Explanation opens after your attempt
Correct Answer

B. (x=3,\ y=3)

Step 1

Concept

From the second equation use (y=9-2x). Substituting in the first gives (13x=39), so (x=3,\ y=3).

Step 2

Why this answer is correct

The correct answer is B. (x=3,\ y=3). From the second equation use (y=9-2x). Substituting in the first gives (13x=39), so (x=3,\ y=3).

Step 3

Exam Tip

दूसरे समीकरण से (y=9-2x) रखें। पहले समीकरण में रखने पर (13x=39), इसलिए (x=3,\ y=3)।

Question me issue ya doubt hai?

Answer, explanation, typing mistake ya suggestion directly hamari team ko bhejein. 📱Helpline (Call / WhatsApp): +91 7272824365

Related Mathematics Questions

FAQs

Mathematics Answer, Explanation and Revision Hints

समीकरणों (7x-3y=20) और (2x+y=9) का हल कौन-सा है? / Which is the solution of (7x-3y=20) and (2x+y=9)?

Correct Answer: B. (x=3,\ y=3). Explanation: दूसरे समीकरण से (y=9-2x) रखें। पहले समीकरण में रखने पर (13x=39), इसलिए (x=3,\ y=3)। / From the second equation use (y=9-2x). Substituting in the first gives (13x=39), so (x=3,\ y=3).

Which concept should I revise for this Mathematics MCQ?

From the second equation use (y=9-2x). Substituting in the first gives (13x=39), so (x=3,\ y=3).

What exam hint can help solve this Mathematics question?

दूसरे समीकरण से (y=9-2x) रखें। पहले समीकरण में रखने पर (13x=39), इसलिए (x=3,\ y=3)।