Răspuns :
x/y = 2/3
(6x + y)/(x + 3y) = (6x/y + y/y)/(x/y + 3y/y) = (6×2/3 + 1)/(2/3 + 3) = (4 + 1)/(2/3 + 9/3) = 5/(11/3) = 5 × 3/11 = 15/11
x/y = 2/3
(6x + y)/(x + 3y) = (6x/y + y/y)/(x/y + 3y/y) = (6×2/3 + 1)/(2/3 + 3) = (4 + 1)/(2/3 + 9/3) = 5/(11/3) = 5 × 3/11 = 15/11