Respostas

2013-11-10T10:53:30-02:00
 X/2+Y= 5 

(10,0) => 10/2+0=5 => 5+0=5
(6,2) => 6/2+2=0 => 3+2=5
(20,-5) => 20/2-5 => 10-5=5