Решите графически систему уравнений: y+x=0; 2x+y=-3.

Question

Вопрос:

Ответ:

Accepted Answer

\[\left\{ \begin{matrix} y + x = 0\ \ \ \ \ \\ 2x + y = - 3 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]

\[\left\{ \begin{matrix} y = - x\ \ \ \ \ \ \ \ \ \ \\ y = - 2x - 3 \\ \end{matrix} \right.\ \]

\[y = - x\]

\[x\]	\[0\]	\[1\]
\[y\]	\[0\]	\[- 1\]

\[y = - 2x - 3\]

\[x\]	\[0\]	\[1\]
\[y\]	\[- 3\]	\[- 5\]

\[Ответ:( - 3;3).\]