\[- x - 6x + 24 = - x - 12x - 24\]
\[- 7x + 24 = - 13x - 24\]
\[- 7x + 13x = - 24 - 24\]
\[6x = - 48\]
\[x = - 8\]
\[Ответ:x = - 8.\]