Respostas

2014-08-05T19:06:24-03:00
A) 4x + 12 = 6x + 18
   -2x = 18 - 12
   x = -6/2 
   x = -3
b) 6x = 14 + 10
    6x = 24
    x = 24/6
    x = 4
c) 0,5x - 9 = 1,5
    0,5x = 10,5
     x = 10,5/0,5
     x =  21
d) 2x - 1 = 3 
    2x = 4
    x = 4/2
    x = 2
e) -3x + 4x = -10 + 6
      x = -4
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