Respostas

2014-07-23T16:01:15-03:00
2x+4=-2x+16
2x+2x= 16-4
4x= 12 
x= 12\4
x= 3 
2014-07-23T16:02:26-03:00
2x+4=-2x+16
2x+2x=16-4
4x=12
x=12/4
x=3