Respostas

2013-11-24T13:55:39-02:00
-5x=-90+41+89-45
-5x=-49+89
-5x=40-45
-5x=-5
x=1
1 5 1
2013-11-24T13:55:53-02:00
-5x= -90+41-45+89
-5x= -5
x: -5 /-5
x= 1