Respostas

2014-07-22T11:37:47-03:00
4(x + 1) + 4(2x - 1) - 2x - 30
4x + 4 + 8x - 4 - 2x - 30
4x + 8x - 2x + 4 - 4 - 30
12x - 2x - 30
10x - 30
1 5 1