Question

x+2y=7
4x-y=10
alguem faz essa equaçao pra mim?

Answer 1

x + 2y = 7

4x - y = 10 * (2)
_________

x + 2y = 7

8x - 2y = 20

9x = 27

X = 27/9

X = 3


2y = 7 - x

2y = 7 - 3

y = 4/2

y = 2




S = { 3 , 2 }