\[\left\{ \begin{matrix}
8x - 32 < 0\ \ \ \ \\
- 3x + 15 > 0 \\
\end{matrix} \right.\ \Longrightarrow \left\{ \begin{matrix}
8x < 32 \\
3x < 15 \\
\end{matrix} \right.\ \Longrightarrow \left\{ \begin{matrix}
x < 4 \\
x < 5 \\
\end{matrix} \right.\ \]

\[Ответ:( - \infty;4).\]