यदि (2x+ky=18) और (x+y=7) का हल (x=4,\ y=3) है, तो (k) का मान क्या है?

If (2x+ky=18) and (x+y=7) have solution (x=4,\ y=3), what is the value of (k)?

Explanation opens after your attempt
Correct Answer

C. \(\frac{10}{3}\)

Step 1

Concept

Put (x=4,\ y=3) in (2x+ky=18). Then (8+3k=18), so \(k=\frac{10}{3}\).

Step 2

Why this answer is correct

The correct answer is C. \(\frac{10}{3}\). Put (x=4,\ y=3) in (2x+ky=18). Then (8+3k=18), so \(k=\frac{10}{3}\).

Step 3

Exam Tip

(x=4,\ y=3) को (2x+ky=18) में रखें। (8+3k=18), इसलिए \(k=\frac{10}{3}\)।

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Mathematics Answer, Explanation and Revision Hints

यदि (2x+ky=18) और (x+y=7) का हल (x=4,\ y=3) है, तो (k) का मान क्या है? / If (2x+ky=18) and (x+y=7) have solution (x=4,\ y=3), what is the value of (k)?

Correct Answer: C. \(\frac{10}{3}\). Explanation: (x=4,\ y=3) को (2x+ky=18) में रखें। (8+3k=18), इसलिए \(k=\frac{10}{3}\)। / Put (x=4,\ y=3) in (2x+ky=18). Then (8+3k=18), so \(k=\frac{10}{3}\).

Which concept should I revise for this Mathematics MCQ?

Put (x=4,\ y=3) in (2x+ky=18). Then (8+3k=18), so \(k=\frac{10}{3}\).

What exam hint can help solve this Mathematics question?

(x=4,\ y=3) को (2x+ky=18) में रखें। (8+3k=18), इसलिए \(k=\frac{10}{3}\)।