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