Respostas

2014-02-28T13:49:57-03:00
X/y=1/6
6x=y

x+y=42
x=42-y

x+y=42
y=42-x

subtitui o y=6x

x=42-6x
7x=42
x=6 

agora substitui o x=6
y=42-6
y=36

Ta ai a razão 6/36=1/6 
x/y=1/6