Respostas

2014-04-06T20:01:29-03:00
a) x + 3/3                  2x - 1/2
{x | x ∈ R}                 {x | x ∈ R}


b)
  
|2 x  x | 2 x
|1 2 1 | 1 2
|3 1 2 | 3 1

8 + 3x + x - x - 2 - 6x = 0
4x - 7x + 6 = 0
-3x + 6 = 0
-3x = -6
3x = 6
x = 2


Belezinha?