Respostas

2014-04-24T10:35:57-03:00
2x + 3 = 6 - x
3x = 3
x  =  1
2014-04-24T10:44:16-03:00
2x + 3 = 6 - x 
2x + x = 6 - 3
3x = 3
x = 3 / 3
x = 1
1 5 1