Respostas

2013-11-04T09:43:46-02:00
4x+18=70
4x=70-18
4x=52
x=52/4
x=13.
3 3 3
2013-11-04T09:45:14-02:00
4x+18=70
4x=70-18
4x=52
x=52/4
x=13
:)
2 5 2