\[\boxed{\mathbf{950\ (950).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \left\{ \begin{matrix} 3x - 5 < 23 - 4x \\ 7x - 9 \leq 9x + 1\ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]
\[\ \left\{ \begin{matrix} 7x < 28 \\ - 2x \leq 10 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} x < 4\ \ \\ x \geq - 5 \\ \end{matrix} \right.\ \]
\[Целые\ решения:\ - 5 - 4 - 3 -\]
\[- 2 - 1 + 0 + 1 + 2 + 3 = - 9.\]
\[Ответ:\ S = - 9.\]
\[2)\ \left\{ \begin{matrix} 2 \cdot (3x - 4) < 3 \cdot (4x - 5) + 23 \\ 4 \cdot (x + 1) \leq 3x + 5\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \ \]
\[\ \left\{ \begin{matrix} 6x - 8 < 12x - 15 + 23 \\ 4x + 4 \leq 3x + 5\ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} - 6x < 16 \\ x \leq 1\ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\left\{ \begin{matrix} x > - \frac{16}{6} \\ x \leq 1\ \ \ \ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\ \left\{ \begin{matrix} x > - 2\frac{2}{3} \\ x \leq 1\ \ \ \ \ \\ \end{matrix} \right.\ \]
\[Целые\ решения:\ \ - 2 - 1 +\]
\[+ 0 + 1 = - 2.\]
\[Ответ:\ S = - 2.\]