Question

Metodo de reduccion

-2x-4y=10
2x-3y=3

Answer 1

[1] -2x - 4y = 10

[2] 2x - 3y = 3

Si sumas [1] y [2]

-7y = 13

y = -13/7

Reemplaza valor de y en [2]

2x - 3y = 3

2x - 3(-13/7) = 3

2x + 39/7 = 3

2x = 3 - 39/7

2x = (21 - 39)/7

2x = -18/7

x = - 18/14

x = - 9/7

Comprobando los valores de x, y en [1]

-2x - 4y = 10

-2(-9/7) - 4(-13/7) = 10

18/7 + 52/7 = 10

70/7 = 10

10 = 10