\[\left\{ \begin{matrix}
x - 7y = 0\ \ \ \ \ \\
12x + y = 17 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
x = 7y\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\
12 \cdot 7y + y = 17 \\
\end{matrix} \right.\ \text{\ \ \ \ \ }\]
\[\left\{ \begin{matrix}
x = 7y\ \ \ \ \ \ \ \ \ \ \ \ \\
84y + y = 17 \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
x = 7y\ \ \ \ \\
85y = 17 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = 0,2\ \ \ \ \ \\
x = 7 \cdot 0,2 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
y = 0,2 \\
x = 1,4 \\
\end{matrix} \right.\ \]
\[Ответ:(1,4;0,2).\]