Respostas

2013-11-13T21:42:28-02:00
X-2/3+y=1/2
x-y=1/2+2/3
x-y=3/6+4/6
x-y=7/6

x-y-1/2=2
x-y=2+1/2
x-y=4/2+1/2
x-y=5/2

x-y=7/6      x=7/6+y
x-y=5/2
7/6+y-y=5/2
y=5/2-7/6
y=15/6-7/6
y=8/6

x=7/6+8/6
x=15/6

Razão:
8/6/15/6     ou 1,33/2,5