Решите уравнение: 3|x|-1=0.

\[3|x| - 1 = 0\]

\[3|x| = 1\]

\[|x| = \frac{1}{3}\]

\[x = \frac{1}{3}\ \ \ или\ \ \ \ x = - \frac{1}{3}\]

\[Ответ:\frac{1}{3};\ - \frac{1}{3}.\]