Question

2x+y=4
x-2y=-3
alguem?

Answer 1

2x+y=4
x-2y=-3 (-2)

2x+y=4
-2x+4y=6
5y=10
y=10/5
y=2

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