Respostas

2013-09-13T12:31:50-03:00
2x-5x = 6
-3x = 6
x = 6/3
x = 2

x-2 = 3-2
x-2 = 1
x =1 + 2
x = 3

3x-2 = x-1
3x - x = -1 + 2
2x = 1
x = 1/2 
x =  0,5