2x+y=4; x-2y=3.
\[\left\{ \begin{matrix} 2x + y = 4 \\ x - 2y = 3 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 4 - 2x \\ 2y = x - 3 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} y = 4 - 2x\ \ \ \ \ \ \ \ \ \ (1) \\ y = 0,5x - 1,5\ \ \ (2) \\ \end{matrix} \right.\ \]
\[(1)\]
\[x\] | \[0\] | \[1\] |
---|---|---|
\[y\] | \[4\] | \[2\] |
\[(2)\]
\[x\] | \[1\] | \[3\] |
---|---|---|
\[y\] | \[- 1\] | \[0\] |
\[Ответ:(2,2;\ - 0,4).\]