Решите графически систему уравнений: x+y=-1; 3x+3y=-2.

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Accepted Answer

\[\left\{ \begin{matrix} x + y = 1\ \ \ \ \ \ \ \ \\ 3x + 3y = - 2 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ }\]

\[\left\{ \begin{matrix} y = 1 - x\ \ \ \ \ \ \ \ \\ 3y = - 2 - 3x \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]

\[\left\{ \begin{matrix} y = 1 - x\ \ \\ y = - x - \frac{2}{3} \\ \end{matrix} \right.\ \]

\[y = 1 - x\]

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

\[3y = - x - \frac{2}{3}\]

\[x\]	\[0\]	\[1\]
\[y\]	\[- \frac{2}{3}\]	\[- \frac{5}{3}\]

\[Ответ:нет\ решений.\]