Ответ:
\[x \cdot 1\frac{9}{11} = \frac{5}{33}\]
\[x \cdot \frac{20}{11} = \frac{5}{33}\]
\[x = \frac{5}{33}\ :\frac{20}{11} = \frac{5}{33} \cdot \frac{11}{20}\]
\[x = \frac{1}{12}.\]
\[x \cdot 1\frac{9}{11} = \frac{5}{33}\]
\[x \cdot \frac{20}{11} = \frac{5}{33}\]
\[x = \frac{5}{33}\ :\frac{20}{11} = \frac{5}{33} \cdot \frac{11}{20}\]
\[x = \frac{1}{12}.\]