Respostas

2014-06-21T15:26:37-03:00
A RESPOSTA:
7 x + 9 = 3
7 x = 3 - 9
7 x = - 6
 x = - 6/7
2014-06-21T15:40:24-03:00
7x + 9 = 3
7x = 3 - 9
7x = - 6
x = - 6
        7