Question

Solve :
$m+n=12;$ $m-n=10$

Answer 1

Given the equations $m+n=12;$......(1) and $m-n=10$......(2).

Now adding (1) and (2) we get,

$2m=22$

or, $m=11$.

Again subtracting (2) from (1) we get,

$2n=2$

or, $n=1$.