Respostas

2013-09-18T22:53:09-03:00
9x - 3 - x - 2 +2x - 2 - 5 = 0
10x = 10
x = 1

1 5 1
2013-09-18T23:15:53-03:00
(9x-3)-(x+2)+2(x-1)-5=0
9x-3-x-2+2x-2-5=0
9x-2x=+3+2+2+5
7x=12
x=12/7