Question

Sendo 4x - 2y = 2 e 2x +2y = 4 determine o valor de x e y *

Answer 1

4x-2y=2

2x+2y=4 2y= 4-2x

4x-2y=2 2x+2y= 4

4x- 4-2x=2 2.3+2y=4

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

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

2x=6 2y= -2

x=6/2 y= -2/2

x=3 y= -1