Respostas

2013-10-03T18:25:58-03:00
3(2x - 3) + 2(x + 1) = 3x + 18
6x - 9 + 2x + 2 = 3x + 18
6x + 2x - 3x = 18 + 9 - 2
5x = 25
x = 25/5
x = 5
27 4 27
2013-10-03T18:26:44-03:00
3*(2x-3) + 2*(x+1) = 3x+18
6x - 9 + 2x +2 = 3x + 18
6x + 2x -3x = 18 + 9 - 2
5x = 25
x = 25/5
x = 5 
19 4 19