Question

X+7y=2 x+2y=12 metodo de igualacion

Answer 1

x+7y=2.........(1)

x +2y= 12.....(2)

De (1):

x = 2 - 7y.........(3)

De (2):

x = 12 - 2y.......(4)

Igualamos (3) = (4):

2 - 7y = 12 - 2y

- 7y + 2y = 12 - 2

- 5y = 10

y = 10 / -5

y = - 2

Sustituyendo y en (3):

x = 2 - 7(- 2)

x = 2 + 14

x = 16