\[\left\{ \begin{matrix} x + y = 5\ \ \\ y = 2x + 2 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} y = - x + 5 \\ y = 2x + 2\ \\ \end{matrix} \right.\ \]
\[Решение:\ (1;4).\]