किस संख्या से (2x+3y=13) को गुणा करना चाहिए ताकि (4x-5y=1) के साथ (x) हट सके?
By what number should (2x+3y=13) be multiplied so that (x) can be eliminated with (4x-5y=1)?
Explanation opens after your attempt
B. (-2)
Concept
Multiplying (2x) by (-2) gives (-4x). It cancels with (4x) when added.
Why this answer is correct
The correct answer is B. (-2). Multiplying (2x) by (-2) gives (-4x). It cancels with (4x) when added.
Exam Tip
(2x) को (-2) से गुणा करने पर (-4x) बनेगा। यह (4x) के साथ जुड़कर हट जाएगा।
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