Respostas

2013-09-26T21:21:11-03:00
X+x-2+x/2=    2x+2+x/2   colocando o x em evidencia

x(2-1/2)+2 
1 1 1
2013-09-26T23:35:11-03:00
X+x-2+x/2=
2x+2x-4+x=0
5x-4=0
5x=4
x=4/5