Respostas

2014-07-17T13:40:48-03:00
6 - 4x = 10 + 6x
- 4x - 6x = 10 - 6
-10x = 4
- x = 4/10 . (-1)
x = - 4/10

2014-07-17T13:44:11-03:00
6 - 4x = 10 + 6x
6 - 10 = 6x +4x
-4 = 10x
x =  -4    
       10

(simplificando)

 -4  :2 =  -2 
 10          5