Question

2x - y = 12
2x+3y=56​

Answer 1

Explicação passo-a-passo:

2x-y=12 -y=12-2x (-1) y=-12+2x

2x+3y=56

2x+3(-12+2x)=56

2x-36+6x=56

8x=56+36

8x=92

x=92/8

x=11,5

2x-y=12

2.11,5-y=12

23-y=12

-y=12-23

-y=-11(-1)

y=11