Respostas

2013-10-15T17:20:04-03:00
2 / 5 x + x / 2 + 45 = X
4 x / 10 + 5 x / 10 + 450 / 10 = 10 X / 10
9 x - 10 x = - 450
- X = - 450  . ( - 1 )
x = 450
14 3 14