paulricar0 17/04/2020 -2+2y=1202x-y=603y=180/3=60 y=60-2=2y=120-2+60=120-2=120-60-2=60/2 =-30faz desse jeito que ta certo
paulricar0
-2+2y=120
2x-y=60
3y=180/3=60 y=60
-2=2y=120
-2+60=120
-2=120-60
-2=60/2
=-30
faz desse jeito que ta certo