\[6\frac{4}{6} < \frac{x}{6} < 7\frac{5}{6};\ \ где\ \]
\[x - натуральное\ число.\]
\[\frac{40}{6} < \frac{x}{6} < \frac{47}{6}\]
\[40 < x < 47\ \ \]
\[x = \left\{ 41;42;43;44;45;46 \right\}.\]