\[2|x| - 5 = 0\]
\[2|x| = 5\]
\[2x = 5\ \ \ или\ \ \ \ \ - 2x = 5\]
\[x = \frac{5}{2} = 2,5\ \ \ \ \ \ \ \ x = - \frac{5}{2} = - 2,5\]
\[Ответ:2,5;\ - 2,5.\]