\[(x - 5)^{4} + (x - 9)^{4} = 32\]
\[t = \frac{x - 5 + x - 9}{2} = \frac{2x - 14}{2} =\]
\[= x - 7\]
\[(t + 2)^{4} + (t - 2)^{4} = 32\]
\[2t^{2}\left( t^{2} + 24 \right) = 0\]
\[x - 7 = 0\]
\[x = 7\]
\[Ответ:7.\]