Respostas

2014-07-22T20:57:19-03:00
5x-3=2x+9 
5x-2x= 9+3
3x=12
x=12/3
x=4
8 4 8
2014-07-22T21:20:41-03:00
5x - 3 = 2x + 9
5x - 2x = 9 + 3
3x = 12
x = 4
2 2 2