\[y = 3x + 6\ \ \ \ и\ \ \ y = - 2x - 1\]
\[\left\{ \begin{matrix} y = 3x + 6\ \ \ \\ y = - 2x - 1 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 3x + 6\ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ 3x + 6 = - 2x - 1 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 3x + 6 \\ 5x = - 7\ \ \ \ \ \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} x = - \frac{7}{5}\text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ } \\ y = 3 \cdot \left( - \frac{7}{5} \right) + 6 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} x = - 1,4 \\ y = 1,8\ \ \ \\ \end{matrix} \right.\ \]
\[Ответ:( - 1,4;1,8).\]