\[12x^{2} - x = 0\]
\[x \cdot (12x - 1) = 0\]
\[x = 0,\ \ 12x = 1\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = \frac{1}{12}\]
\[Ответ:x = 0;x = \frac{1}{12}.\]