Question

4x-y=12 e 6x+2y=14 sistema

Answer 1

4x - y= 12
6x + 2x = 14

y = 14 - 4x

6x + 2y = 14
6x + 2 (12 - 4x ) = 14
6x + 24 - 8x = 14
-2x = -10 . (-1)
2x = 10
x= 10/2
x= 5

y= 12 - 4x
y = 12 - 4 . (5)
y = 12 - 20
y = -8

S {(5,-8)}