\[33 - 8x = x^{2}\]
\[x^{2} + 8x - 33 = 0\]
\[D = 64 + 132 = 196\]
\[x = \frac{- 8 \pm 14}{2} = 3;\ - 11\]
\[x_{1} = 3;\ \ \ \ \ \ \]
\[x_{2} = - 11\ \]
\[(не\ подходит\ по\ ОДЗ)\]
\[Ответ:3.\ \]