\[\left\{ \begin{matrix} y = - 4x\ \ \ \ \\ y = 2x + 6 \\ \end{matrix} \right.\ \]
\[- 4x = 2x + 6\]
\[- 6x = 6\]
\[x = - 1\]
\[y = - 4x\]
\[y = - 4 \bullet ( - 1)\]
\[y = 4\]
\[Ответ:( - 1;4).\]