Respostas

2013-09-10T21:00:19-03:00
10-9x+2x=2-3x
-7x+3x=2-10
-4x=-8 .(-1)
4x=8
x= \frac{8}{4}
x=2 
qualquer duvida pergunte :)
1 5 1
2013-09-10T21:03:59-03:00
-9x+2x+3x=2-10
-7x+3x= - 8
-4x=-8 (-1)
4x=8
x=8/4
x=2