Respostas

2013-09-11T10:47:22-03:00
X + y = 35
y = 35 - x

x/y = 1/4 ------------------------ (substitua y por 35 - x):
x/(35 - x) = 1/4 ---------------- (multiplique "em cruz"):
1 . (35 - x) = 4 . x
35 - x = 4x
35 = 4x + x
5x = 35
x = 35/5
x = 7

Se (y = 35 - x):
y = 35 - 7
y = 28

7/28 = 1/4
6 3 6