\[\left\{ \begin{matrix}
8 \cdot (2x - 3) - 3 \cdot (4y - 3) = 9 \\
0,6x + 0,2y = 2,2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | \cdot 10 \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
16x - 24 - 12y + 9 = 9 \\
6x + 2y = 22\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
16x - 12y = 24\ \ \ \ \ \\
6x + 2y = 22\ \ | \cdot 6 \\
\end{matrix} \right.\ \]
\[\left\{ \begin{matrix}
16x - 12y = 24\ \ \\
36x + 12y = 132 \\
\end{matrix} \right.\ ( + )\]
\[52x = 156\]
\[x = 3.\]
\[2y = 22 - 6x = 22 - 6 \cdot 3 = 22 - 18\]
\[2y = 4\]
\[y = 2.\]
\[\left\{ \begin{matrix}
x_{0} = 3 \\
y_{0} = 2 \\
\end{matrix} \right.\ \]
\[x_{0} - y_{0} = 3 - 2 = 1.\]
\[Ответ:1)\ 1.\]