\[\frac{6x + 9}{x - 8} < 0\]
\[6x + 9 = 0\]
\[6x = - 9\]
\[x = - 1,5.\]
\[x - 8 = 0\]
\[x = 8.\]
\[Ответ:x \in ( - 1,5;8).\]