Решите систему уравнений 13x-8y=28; 11x-8y=24.

\[\left\{ \begin{matrix} 13x - 8y = 28 \\ 11x - 8y = 24 \\ \end{matrix} \right.\ \ (–)\]

\[2x = 4\]

\[x = 2.\]

\[8y = 11x - 24\]

\[8y = 22 - 24\]

\[8y = - 2\]

\[y = - \frac{2}{8} = - \frac{1}{4} = - 0,25.\]

\[\left\{ \begin{matrix} x = 2\ \ \ \ \ \ \ \ \ \\ y = - 0,25 \\ \end{matrix} \right.\ \]

\[Ответ:(2;\ - 0,25).\]