\[\boxed{\text{1050\ (1050).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[Ответ:(1;2).\]
\[\left\{ \begin{matrix} y = - 1\ \ \ \ \ \ \ \\ x = \frac{13 - 7}{2} \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} y = - 1 \\ x = 3\ \ \ \ \\ \end{matrix} \right.\ \]
\[Ответ:(3;\ - 1).\]
\[\left\{ \begin{matrix} x = 4\ \ \ \ \ \ \ \ \ \ \ \ \\ y = \frac{38 - 32}{3} \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} x = 4 \\ y = 2 \\ \end{matrix} \right.\ \]
\[Ответ:(4;2).\]
\[\left\{ \begin{matrix} y = 5\ \ \ \ \ \ \ \ \ \ \ \ \ \\ x = \frac{10 + 4y}{5} \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} y = 5 \\ x = 6 \\ \end{matrix} \right.\ \]
\[Ответ:(6;5).\]
\[\left\{ \begin{matrix} b = 0,5\ \ \ \ \ \ \ \ \\ a = \frac{2 + 2,5}{3} \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} b = 0,5 \\ a = 1,5 \\ \end{matrix} \right.\ \]
\[Ответ:(1,5;0,5).\]
\[Ответ:(1;\ - 1)\text{.\ }\]