Respostas

2013-09-19T17:25:22-03:00
-4x= 8
-4x= 8(-1)
4x= -8
x= -8/4
x= -2
1 5 1
2013-09-19T17:28:54-03:00
- 4x = 8 *(-1)
4X = - 8
X = - 8/4
X = - 2