Решите двойное неравенство -4<(8a+3)/7<2.

\[- 4 < \frac{8a + 3}{7} < 2\]

\[- 28 < 8a + 3 < 14\]

\[- 31 < 8a < 11\]

\[- \frac{31}{8} < a < \frac{11}{8}\]

\[Ответ:\left( - \frac{31}{8};\ \frac{11}{8} \right).\]