Вопрос:

Ответ:

\[12x^{2} - x = 0\]

\[x \cdot (12x - 1) = 0\]

\[x = 0,\ \ 12x = 1\]

\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = \frac{1}{12}\]

\[Ответ:x = 0;x = \frac{1}{12}.\]