Respostas

2014-03-04T12:25:51-03:00
9 - 6 + 3x + 24 + 8 - 10x = 20 - 5 - 2x
35 - 7x = 15 - 2 x
- 5x = - 20 (-1)
5x = 20
x = 20/5
x = 4
2 3 2