Question

7m+4n=13
5m-2n=19 metodo de sustitucion

Answer 1

7m + 4n = 13 (1)

5m - 2n = 19 (2)

En 2

5m - 2n = 19

5m - 19 = 2n

n = (5m - 19)/2

Ahora reemplazo en (1)

7m + 4n = 13

7m + 4[(5m - 19)/2] = 13

7m + 2(5m - 19) = 13

7m + 10m - 38 = 13

17m = 13 + 38

17m = 51

m = 51/17

m = 3

Ahora:

n = (5m - 19)/2

n = (5(3) -19)/2

n = (15 - 19)/2

n = (-4)/2

n = -2

Rta: m = 3; n = -2