Respostas

2013-09-13T19:05:59-03:00
3x-4x = 9 +2
| -x = 11
| x = -11 ?
|
4 4 4
2013-09-13T19:05:59-03:00
3x -2 = 4x + 9
3x - 4x = 9 + 2
-x = 11   * (-1)
x = -11
3 5 3