Respostas

2013-08-21T16:24:50-03:00
numero = x
x/7 +1 = x/2

(x + 7)/7 = x/2

2 ( x+7) = 7x

2x + 14 = 7x

14 = 7x - 2x

5x = 14

x = 14/5

x = 2,8