Respostas

2013-12-04T23:14:37-02:00
3------12
2------x
3x= 12.2
3x= 24
x= 24/3
x= 8
2013-12-04T23:15:47-02:00
3/2 = 12/x     (inversamente proporcionais)
36 = 2x
  x = 36/2
  x = 18 dias