Respostas

2014-03-22T09:09:12-03:00
X + 2 = 8
x = 8 - 2
x = 6


3x-1 = 4
3x = 4 + 1
3x = 5
x = 5
      3


x + 28 = 11
x = 11 - 28
x = -17


3x-4 = 2x + 8
3x - 2x = 8 + 4
x = 12
2014-03-22T09:20:49-03:00
X=8-2
x=6

3x=4+1
3x= 5
x=5/3

x=11-28
x=-17

3x-2x=8+4
x= 12