Respostas

2014-09-02T23:07:30-03:00
3x-25 = x+55
3x-x = 55+25
2x = 80
x=80/2

x=40
2014-09-02T23:18:34-03:00
3x-25 =x +55
3x-x =+55+25
2x=+80
x =+80/2
x=+40