Respostas

2014-05-04T19:38:49-03:00
(2x + 1).(x/ - 2) = x + 5
x - 4x - 2 = x + 5
x - 4x - x - 2 =5
- 4x = 5 + 2
 - 4x = 7
   x = 7/4
   x = 1,75