\[\boxed{\text{1058\ (1058).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[mx - ny = 6,\ \ \]
\[\text{C\ }(2;\ - 1),\ D\ ( - 6;5).\]
\[\left\{ \begin{matrix} n = - 12 \\ m = \frac{6 + 12}{2} \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} n = - 12 \\ m = 9 \\ \end{matrix} \right.\ \]
\[Ответ:n = - 12;m = 9.\ \ \]