\[\boxed{\mathbf{47.}}\]
\[\log_{a}(x - 2) > \log_{a}(8 - x);(1;5).\]
\[x - 2 > 0\]
\[x > 2.\]
\[8 - x > 0\]
\[x < 8.\]
\[M = (2;8).\]
\[a > 1:\]
\[x - 2 > 8 - x\]
\[2x > 10\]
\[x > 5.\]
\[0 < a < 1:\]
\[x - 2 < 8 - x\]
\[2x < 10\]
\[x < 5.\]
\[Ответ:a \in (0;1).\]