Вопрос:

Ответ:

\[\left\{ \begin{matrix} y = - x\ \ \ \ \\ y = x - 8 \\ \end{matrix} \right.\ \]

\[- x = x - 8\]

\[2x = 8\]

\[x = 4\]

\[y = - x\]

\[y = - 4\]

\[Ответ:\ \ (4;\ - 4).\]