Question

solve by elimination method


7n-2m=5
8n+7m=15​

Answer 1

$\huge\mathfrak\red{Heya Mate}$

$\mathcal\blue\boxed{ANSWER}$

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$7n - 2 m= 5 - - - - 1 \\ 8 n+ 7m = 15 - - - 2 \\ \\ multiplying \: 1 \: by \: 7 \: and \: 2 \: by \: 2 \\ \\ 49n - 14m = 35 \\ 16n + 14 m= 30 \\ \\ adding \: them \: we \: get \: \\ \\ 65n = 65 \\ therefore \\ \\ n = 1 \\ \\ \\ \\ substituting \: n = 1 \: in \: equation \: 1 \\ \\ 7n - 2m = 5 \\ 7 \times 1 - 2m = 5 \\ - 2m = - 2 \\ \\ therefore \\ m = 1 \\ \\ \\ m= 1 \: and \: n= 1$

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