Respostas

2014-05-22T21:16:08-03:00
-3x = -2 + 8 
-3x = 6 
- x = 6/3
- x = 2
x = -2 
2014-05-22T21:16:13-03:00
-3x-8=-2
-3x = -2+8
-3x = +6 (.-1)
3x = -6
x = -6/3
x = -2