यदि (3x-4y=-2) और (5x+4y=34), तो (2x+y) का मान क्या है?

If (3x-4y=-2) and (5x+4y=34), what is the value of (2x+y)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{23}{2}\)

Step 1

Concept

Adding both equations gives (8x=32), so (x=4). Then \(y=\frac{7}{2}\), hence \(2x+y=\frac{23}{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{23}{2}\). Adding both equations gives (8x=32), so (x=4). Then \(y=\frac{7}{2}\), hence \(2x+y=\frac{23}{2}\).

Step 3

Exam Tip

दोनों समीकरण जोड़ने पर (8x=32), इसलिए (x=4)। फिर \(y=\frac{7}{2}\), अतः \(2x+y=\frac{23}{2}\)।

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Mathematics Answer, Explanation and Revision Hints

यदि (3x-4y=-2) और (5x+4y=34), तो (2x+y) का मान क्या है? / If (3x-4y=-2) and (5x+4y=34), what is the value of (2x+y)?

Correct Answer: A. \(\frac{23}{2}\). Explanation: दोनों समीकरण जोड़ने पर (8x=32), इसलिए (x=4)। फिर \(y=\frac{7}{2}\), अतः \(2x+y=\frac{23}{2}\)। / Adding both equations gives (8x=32), so (x=4). Then \(y=\frac{7}{2}\), hence \(2x+y=\frac{23}{2}\).

Which concept should I revise for this Mathematics MCQ?

Adding both equations gives (8x=32), so (x=4). Then \(y=\frac{7}{2}\), hence \(2x+y=\frac{23}{2}\).

What exam hint can help solve this Mathematics question?

दोनों समीकरण जोड़ने पर (8x=32), इसलिए (x=4)। फिर \(y=\frac{7}{2}\), अतः \(2x+y=\frac{23}{2}\)।