§ Задание 130
\[\boxed{\mathbf{4.}\mathbf{130}}\]
\[\textbf{а)}\ x = 5;\]
\[\textbf{б)}\ x = - 5;\]
\[\textbf{в)}\ x = 1;\]
\[\textbf{г)}\ x = 4.\]
\[\boxed{\mathbf{4.}\mathbf{130}}\]
\[\textbf{а)}\ x = 5;\]
\[\textbf{б)}\ x = - 5;\]
\[\textbf{в)}\ x = 1;\]
\[\textbf{г)}\ x = 4.\]