Respostas

2013-11-18T11:44:56-02:00
5x-2=7+6
5x=13+2
x=15/5
x=5
errei, descupa, o resultado da 3
2013-11-18T11:45:58-02:00
5x-2=7+6
5x=2+7+6
5x=15
x=15/5
x=3