7 целых 1/3 : 2 целых 1/2 = 3 целых 2/3 : y
7 1/3у=3 2/3*2 1/2 22/3у=11/3*5/4 22/3у=55/12 у=55/12:22/3 у=55/12*3/22 у=55/88 у=0,625
7 1/3y=2 1/2×3 2/3 22/3 y=55/6 y=55/6× 3/22 y=5/4 y=1цел 1/4