\[\left\{ \begin{matrix}
5x + 7 < 4x + 8 \\
2x + 7 < 0\ \ \ \ \ \ \ \ \ \ \ \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
5x - 4x < 8 - 7 \\
2x < - 7\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
x < 1\ \ \ \ \ \ \ \\
x < - 3,5 \\
\end{matrix} \right.\ \]

\[Ответ:( - \infty; - 3,5).\]