Respostas

2014-08-12T19:08:37-03:00
7x + 8 = 4x - 10
7x - 4x = - 10 - 8
3x = -18
x = -18/3
x = -6
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2014-08-12T19:10:58-03:00
7x+8 = 4x-10
7x+4x = 8-10
11x = 2
x = 11/2
x= 5,5

3 2 3