Решите уравнение: y:1 5/31=7 3/4:1/3.

\[y\ :1\frac{5}{31} = 7\frac{3}{4}\ :\frac{1}{3}\]

\[y = \frac{31 \cdot 3 \cdot 36}{4 \cdot 1 \cdot 31} = 3 \cdot 9\]

\[y = 27.\]