Respostas

2014-03-11T15:19:11-03:00
12-4=8
6/x=12/8.20/15.6000/4000
6/x=8/12.15/20.4000/6000
6/x=2/3.3/4.2/3
6/x=12/36
x=216/12
x=18 dias