\[\left\{ \begin{matrix} x + 4y = - 6 \\ 3x - y = 8\ \ \ \ \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} y = 3x - 8\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ x + 4(3x - 8) = - 6 \\ \end{matrix} \right.\ \]
\[x + 12x - 32 = - 6\]
\[13x = 26\]
\[x = 2.\]
\[y = 3x - 8 = 6 - 8 = - 2.\]
\[Ответ:(2; - 2).\]