Respostas

2014-08-06T15:50:44-03:00
X-2-x-4+2x-6-6=0 2x=18 x=18/2 X=9
2014-08-06T15:52:06-03:00
(x-2)-(x+4)+2(x-3)-6=0
x-2-x-4+2x-6-6=0
2x-6-12=0
2x=18
x=18/2
x=9