Respostas

2013-11-29T10:20:16-02:00
5x = 43 - 13
5x = 30
x = 30/5
x = 6
2013-11-29T10:20:45-02:00
5x + 13 = 43
5x = 43 - 13 
5x = 30
x = 30/5
x = 6