Question

Metodo de eliminación
7m-n=10
4n-3m=2

Answer 1

{7m - n = 10
{4n - 3m = 2

(*4) {7m - n = 10
.(*1) {-3m + 4n = 2

28m - 4n = 40
-3m + 4n = 2
----------------------
25m + 0n = 42

25m = 42
m = 42/25

reemplazamos para hallar el valor de n

*4n - 3m = 2
4n - 3(42/25) = 2
4n - 126/25 = 2
(100n - 126)/25 = 2
100n - 126 = 2 * 25
100n = 50 + 126
100n = 176
n = 176/100
n = 44/25