Respostas

2014-04-21T13:55:53-03:00
X+5=4x
x-4x = -5
-3x = -5 (.-1)
3x = 5
x = 5/3
2014-04-21T13:56:12-03:00
4x-x=5
3x=5
x=5
    3
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