Question

b4x - 4y = 8
(-x-y=4​

Answer 1

Boa noite

-x -y = 4 ×(4)

-4x -4y = 16

4x - 4y = 8

0 -8y = 24

y = -24/8

y = -3

-x - (-3) = 4

-x + 3 = 4

-x = 4 - 3

-x = 1

x = -1

S = {-1 ; -3}