Respostas

2013-07-14T14:55:37-03:00
2x-6x=16
-4x=16
4x=-16
X=16/-4
X=-4
1 5 1
2013-07-14T14:57:33-03:00
2x- 6x - 16= 0
- 4x= 16 . (-1)
4x= -16
x= -16/4
x= - 4
1 5 1