Respostas

2014-08-07T18:05:26-03:00
5x-2x+5x-4=x+10
5x-2x+5x-x=10+4
3x+5x-x=10+4
7x=14
x=14 sobre 7
x=2

Espero ter ajudado
2014-08-07T18:06:05-03:00
5x -2x-4=x+10

5x-2x-x= 10 +4
2x=14
x=14/2
x= 7