\[\left\{ \begin{matrix}
2x - y = 1\ \ \ \ \ \ \\
7x - 6y = - 4 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = 2x - 1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\
7x - 6 \cdot (2x - 1) = - 4 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = 2x - 1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\
7x - 12x + 6 = - 4 \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
y = 2x - 1\ \ \\
- 5x = - 10 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = 3 \\
x = 2 \\
\end{matrix} \right.\ \]
\[Ответ:(2;3).\]