Respostas

2014-07-21T15:07:37-03:00
(3 + x) - 1 = (17 - 4x) - (3 + x) <=>
<=> x + 2 = 14 - 5x <=>
<=> x + 5x = 14 - 2 <=>
<=> 6x = 12 <=>
<=> x = 12/6 = 2 
2014-07-21T15:16:22-03:00
3+x-1=(17-4x)- 3-x
2+x = 17-4x -3 -x
x+4x +x = 17 -2 -3
6x = 12
x = 12/6
x= 2