\[\left\{ \begin{matrix}
3x - 10 > - x + 2 \\
8x - 7 < 3x + 8\ \ \ \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
4x > 12 \\
5x < 15 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
x > 3 \\
x < 3 \\
\end{matrix} \right.\ \]

\[Ответ:нет\ решений.\ \]