Respostas

2014-07-07T17:11:22-03:00
5x - 3 = 2x + 9
5x - 2x = 9 + 3
3x = 12
x = 12/3
x = 4
2014-07-07T17:14:51-03:00
5x-3=2x+9
5x-2x=9+3
3x=12
x=12
     3
x=4