\[\sqrt{x^{2}} = 2 - x\]
\[|x| = 2 - x\]
\[x = - (2 - x)\ \ \ \ \ \ \ \ \ \ \ \ x = 2 - x\]
\[x = - 2 + x\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x + x = 2\]
\[x - x = - 2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 2x = 2\]
\[0 = - 2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = 1\]
\[нет\ решения.\]
\[Ответ:x = 1.\]