\[\frac{1 - 2x}{x - 3} + 1^{\backslash x - 3} \geq 0\]
\[\frac{1 - 2x + x - 3}{x - 3} \geq 0\]
\[\frac{- x - 2}{x - 3} \geq 0;\ \ \ \ x \neq - 3\]
\[- 2 \leq x < 3.\]
\[Ответ:3.\]