Respostas

2013-11-11T19:19:26-02:00
7x - 2 = - 16
7x = - 16 + 2
7x = -14
x = -14/7
x= -2

x + 6 = 8
x = 8 -6
x= 2
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2013-11-11T19:20:35-02:00
7x -2=-16   x + 6=8
7x= 14      x =2
x= 14/7
x = 2
2 5 2