(x+y)/y=3 x+y=3y x=2y 1) x/y => 2y/y = 2 2) y/(x+y) => y/(2y+y)= y/3y = 1/3 3) (x-y)/y => (2y-y)/y = y/y = 1 4) y/x => y/2y = 1/2