\[\left\{ \begin{matrix} 6x \leq - 6 \\ 7x \geq - 7 \\ \end{matrix} \right.\ \text{\ \ \ \ \ }\]
\[\left\{ \begin{matrix} x \leq - 1 \\ x \geq - 1 \\ \end{matrix} \right.\ \]
\[Ответ:\ \left\{ - 1 \right\}.\]