\[\left\{ \begin{matrix} 2x - y = - 1 \\ x + y = - 2\ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 2x + 1\ \ \ \ (1) \\ y = - x - 2\ \ \ (2) \\ \end{matrix} \right.\ \]
\[(1)\ \]
\[x\] | \[0\] | \[1\] |
---|---|---|
\[y\] | \[1\] | \[3\] |
\[(2)\]
\[x\] | \[0\] | 1 |
---|---|---|
\[y\] | \[- 2\] | \[- 3\] |
\[Ответ:( - 1;\ - 1).\]