Respostas

2014-01-09T17:57:01-02:00
A + b = 104
a/b = 3 + ((b - 1)/b)
a = 3b + (b - 1)
a = 4b - 1

(4b - 1) + b = 104
5b = 104 + 1
5b = 105
b = 105/5
b = 21

resposta: 21