Respostas

2013-12-10T00:13:21-02:00
4x+2x=12-6
6x = 6 
x = 6/6
x = 1 

2013-12-10T00:13:31-02:00
4x + 6 = 12 - 2x
4x + 2x = 12 - 6
6x = 6
x = 6 : 6
x = 1
2 4 2