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