Question

{2×+y-4=0 ×+2(×-y)=-1

Answer 1

2x+y=4
3x+2y=-1

y=4-2x

3x+8-4x=-1

-x=-1-8

-x=-9

x=9

y=4-2x

y=4-2 .9

y=4-18

y=-14

espero ter ajudado!