Решите уравнение: x:2 13/36=27/85:1/4.

\[x\ :2\frac{13}{36} = \frac{27}{85}\ :\frac{1}{4}\]

\[x = \frac{27 \cdot 4 \cdot 83}{85 \cdot 1 \cdot 36}\]

\[x = 3.\]