Respostas

2014-08-26T23:27:29-03:00
X+(x/4)=80
(4x/4)+(x/4)=80
(4x+x)/4=80
(5x/4)=80
5x=80.4
5x=320
x=320/5
x=64
2014-08-26T23:28:33-03:00
Desconsidere minha resposta!