Respostas

2013-11-07T11:46:25-02:00
3.2.-2x=-7x
6-6x=-7x
6=-7x+6x
6=-x
x=-6
1 3 1
2013-11-07T11:56:14-02:00
3(2-2x)=-7x6 - 6x = -7x
7x - 6x = -6
x = - 6

1 4 1