(3x+4y=17) के साथ (5x-2y=1) में (y) हटाने के लिए दूसरे समीकरण को किस संख्या से गुणा करना चाहिए?
By what number should (5x-2y=1) be multiplied to eliminate (y) with (3x+4y=17)?
Explanation opens after your attempt
B. (2)
Concept
Multiplying the second equation by (2) gives (-4y). It cancels with (4y) by addition.
Why this answer is correct
The correct answer is B. (2). Multiplying the second equation by (2) gives (-4y). It cancels with (4y) by addition.
Exam Tip
दूसरे समीकरण को (2) से गुणा करने पर (-4y) मिलेगा। यह (4y) के साथ जुड़कर हट जाएगा।
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