Respostas

2013-11-13T14:51:32-02:00
2x+5y=-14      -2
4x-3=24
-4x-10y=28
4x-3=24
13y=52
y=52/13
y=4

2x+5y=-14
2x+5.4=-14
2x+20=-14
2x=-14-20
2x=-34
x=-34/2
x=-17