Respostas

2014-04-24T19:57:14-03:00
2x-4=-x+5
2x+x=5+4
3x=9
x=9/3
x=3
2014-04-24T19:58:20-03:00
2x-4=-x+5
2x+x=5+4
3x=9
x=9/3
x=3