\[\left\{ \begin{matrix} 3 > 5x - a \\ - 3 < 3x + a \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} 5x < a + 3\ \ \ \ \\ 3x > - a - 3 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} x < \frac{a + 3}{5}\text{\ \ \ } \\ x > \frac{- a - 3}{3} \\ \end{matrix} \right.\ \]
\(\text{\ \ \ \ \ \ \ \ \ \ }\)
\[Число\ 2 - решение\ при:\]
\[\frac{- a - 3}{3} < 2 < \frac{a + 3}{5}\]
\[\left\{ \begin{matrix} \frac{a + 3}{5} > 2\ \ \ \\ \frac{- a - 3}{3} < 2 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} a + 3 > 10 \\ - a - 3 < 6 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix} a > 7\ \ \ \ \\ a > - 9 \\ \end{matrix} \right.\ \]
\[Ответ:при\ a \in (7; + \infty).\]