\[\frac{\left( c^{- 4} \right)^{3} \cdot c^{5}}{c^{11}} = c^{- 12} \cdot c^{- 6} = c^{- 18}\]
\[Ответ:3.\]
\[24 - 3x = 2 - 5 \cdot (x - 3)\]
\[24 - 3x = 2 - 5x + 15\]
\[- 3x + 5x = 17 - 24\]
\[2x = - 7\]
\[x = - 3,5.\]
\[Ответ:\ - 3,5.\]