Respostas

2014-02-06T13:11:21-02:00
5x+7=4x+10
5x-4x=10-7
x=3



4x-10=2x+2
4x-2x=2+10
2x=12
x=6
2014-02-06T13:15:39-02:00
5x+7=4x+10
5x-4x=10-7
x=3



4x-10=2x+2
4x-2x=2+10
2x=12
x=12/2
x=6