\[\left\{ \begin{matrix} \frac{x - 1}{2} < \frac{x}{3}\ \ | \cdot 6\ \ \\ \frac{x + 1}{2} \geq \frac{x}{5}\ \ | \cdot 10 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} 3x - 3 < 2x \\ 5x + 5 \geq 2x \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} x < 3\text{\ \ \ \ }\text{\ \ } \\ 3x \geq - 5 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} x < 3\text{\ \ \ } \\ x \geq - 1\frac{2}{3} \\ \end{matrix} \right.\ \]
\[x = - 1;\ \ 0;\ \ 1;\ \ 2.\]
\[Сумма:\ \]
\[- 1 + 1 + 2 = 2.\]
\[Ответ:сумма\ равна\ 2.\]