Respostas

2014-08-25T11:18:07-03:00
2-3x=-2x+13-3x
5x-3x=13-2
2x=11
x=5,5
2014-08-25T11:31:52-03:00
2-3x=-2+13-3x
3x+3x=2-2+13
6x=13
x=13÷6
x=2,16...