\[\left\{ \begin{matrix}
7x + 4y = 10 \\
2x + 3y = 1\ \ \ \\
\end{matrix} \right.\ \]
\[(1;2):\]
\[\left\{ \begin{matrix}
7 \cdot 1 + 4 \cdot 2 = 10 \\
2 \cdot 1 + 3 \cdot 2 = 1\ \ \ \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
7 + 8 = 10 \\
2 + 6 = 1\ \ \ \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
15 \neq 10 \\
8 \neq 1\ \ \ \ \ \\
\end{matrix} \right.\ \]
\[Не\ является.\]