Respostas

2013-07-04T22:07:30-03:00
4x+2=x-10
4x-x=-10-2
3x=-12
x=-4
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2013-07-04T22:07:50-03:00
4x+2=x-10
4x-x=-10-2
3x=-12
x=-12/3

x=-4
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