Răspuns:
2x-3y=7|x4
4x+4y=4|x3
8x-12y=28
12x+12y=12
4x =16
x=4
4x4+4y=4
16+4y=4
4y=-16+4
4y=-12
y=-3
e)2x+y=-2|x-3
3x+2y=-1|x2
-6x-3y=6
6x+4y=-3
1y=-3
2x-3=-1
2x=+3-1
x=1
asa cred
