\[- 4 < \frac{7a - 3}{8} < 2\]
\[- 32 < 7a - 3 < 16\]
\[- 29 < 7a < 19\]
\[- \frac{29}{7} < a < \frac{19}{7}.\]
\[Ответ:\left( - \frac{29}{7};\frac{19}{7} \right).\]