Respostas

2014-01-16T18:05:51-02:00
CS/4 = 12-CS/5

CS * 5 = 4 * (12-CS)
5CS = 48 - 4CS
5CS + 4CS = 48
9 CS = 48
CS = 48 / 9
CS = 16/3
1 5 1