Rezolvati exercitiul 12 (rezolvarea) cat mai repede imi trebuie urgent! dau coroana

3x=2y , x= 2y/3
(3x-y) : (x+3y)
(2y-y):(2y/3 +3y)
y : (2y/3 +9y/3)
y : 11y/3
y×3/11y = 3/11