(4 целых 1/6y+11 целых 1/4)×4/15=2/3y+5целых2/3
(4 1/6+11 1/4)*4/15=2/3y+5 2/31 1/9+3=2/3Y+17/3-2/3Y=17/3-10/9-3-2/3Y=1 5/9Y=1 5/9 : (-2/3)Y=-2 1/3