Ответ:
\[\frac{35}{39}:\frac{13}{42}-\frac{1}{6}=\frac{35}{39}\cdot\frac{42}{13}-\frac{1}{6}=\frac{70}{13}-\frac{1}{6}=\frac{407}{78}.\]
Ответ: \(\frac{407}{78}\).
\[\frac{35}{39}:\frac{13}{42}-\frac{1}{6}=\frac{35}{39}\cdot\frac{42}{13}-\frac{1}{6}=\frac{70}{13}-\frac{1}{6}=\frac{407}{78}.\]
Ответ: \(\frac{407}{78}\).