\[\left\{ \begin{matrix}
x + y = 0\ \ \ \\
x + 2y = 2 \\
\end{matrix} \right.\ \text{\ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = - x\ \ \ \ \ \ \\
2y = 2 - x \\
\end{matrix} \right.\ \text{\ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = - x\ \ \ \ \ \ \ \ \ \ \ \ \ \ (1)\ \\
y = 1 - 0,5x\ \ \ \ (2) \\
\end{matrix} \right.\ \]
\[(1)\]
| \[x\] | \[0\] | \[1\] |
|---|---|---|
| \[y\] | \[0\] | \[- 1\] |
\[(2)\ \]
| \[x\] | \[0\] | \[2\] |
|---|---|---|
| \[y\] | \[1\] | \[0\] |

\[\ Ответ:( - 2;2).\]