solve by cross multiplication ax +by =c2 a2x + b2y = c2
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https://www.meritnation.com/ask-answer/question/solve-by-cross-multiplication-methodax-by-a-2bx-a-y-b/pair-of-linear-equations-in-two-variables/2558577
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https://www.meritnation.com/ask-answer/question/solve-by-cross-multiplication-methodax-by-a-2bx-a-y-b/pair-of-linear-equations-in-two-variables/2558577
Regards