\[\boxed{\text{1019\ (1019).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ \left\{ \begin{matrix} x - y = 2 \\ x + y = 2 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }\]
\[2)\ \left\{ \begin{matrix} x - y = 2\ \ \ \ \\ 2x - 2y = 4 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }\]
\[3)\ \left\{ \begin{matrix} x - y = 2\ \ \ \ \\ 3x - 2y = 6 \\ \end{matrix} \right.\ \ \]