Question

escalonar e resolvar os sistemas 2x-y=8
6x+2y=-4​

Answer 1

2x-y=8

-y=8-2x

-y=8-2x

-y=8-2x .(-1)

y=-8+2x

Logo

6x+2(-8+2x)=-4

6x-16+4x=-4

10x=12

x=12/10

x=6/5

12/5-y=8

-y=40/5-12/5

-y=28/5

y=-28/5