\[\left\{ \begin{matrix} \frac{x}{2} < 5\ \ \\ \frac{2x}{5} > 0 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ }\left\{ \begin{matrix} x < 10 \\ 2x > 0 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ }\left\{ \begin{matrix} x < 10 \\ x > 0\ \ \\ \end{matrix} \right.\ \]
\[Ответ:\ x \in (0;10).\]