Respostas

2013-10-08T20:21:31-03:00
2(x+1) - 3(2x-5) : 6x-3
2x + 2 - 6x +15 : 6x -3
2x -6x -6x : -3 -15 -2
-10x : -20
x : -20 / -10
simplificando
x : 2
2 3 2