\[\left\{ \begin{matrix} x - 3y = 8\ \ \ | \cdot 2 \\ 2x - y = 6\ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \ \]
\[\left\{ \begin{matrix} 2x - 6y = 16 \\ 2x - y = 6\ \ \ \ \ \\ \end{matrix}( - ) \right.\ \]
\[\left\{ \begin{matrix} - 5y = 10 \\ x = \frac{6 + y}{2} \\ \end{matrix} \right.\ \text{\ \ }\ \]
\[\left\{ \begin{matrix} y = - 2 \\ x = 2\ \ \ \\ \end{matrix} \right.\ \]
\[Ответ:(2;\ - 2)\text{.\ }\]