\[\left\{ \begin{matrix} - 2x + y = 3 \\ 3x - y = 1\ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 3 + 2x\ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ 3x - (3 + 2x) = 1 \\ \end{matrix} \right.\ \text{\ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 3 + 2x\ \ \ \ \ \ \ \ \ \ \ \ \ \\ 3x - 3 - 2x = - 1 \\ \end{matrix} \right.\ \text{\ \ \ }\]
\[\left\{ \begin{matrix} x = 2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ y = 3 + 2 \cdot 2 = 7 \\ \end{matrix} \right.\ \]
\[Проверка:\ \]
\[\left\{ \begin{matrix} - 2 \cdot 2 + 7 = 3 \\ 3 \cdot 2 - 7 = - 1 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} 3 = 3\ \ \ \ \ \ \ \\ - 1 = - 1 \\ \end{matrix} \right.\ \Longrightarrow верно.\]
\[Ответ:(2;7).\]