\[\boxed{\mathbf{1126\ (1118)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 9x = - 54\]
\[x = - 54\ :9\]
\[x = - 6\]
\[Ответ:\ - 6.\]
\[2)\ 1,2x = - 6\]
\[x = - 6\ :1,2\]
\[x = - 5\]
\[Ответ:\ - 5.\]
\[3)\ 13x = - 6\]
\[x = - 6\ :13\]
\[x = - \frac{6}{13}\]
\[Ответ:\ - \frac{6}{13}.\]
\[4) - 21x = 48\]
\[x = 48\ :( - 21) = - \frac{48}{21}\]
\[x = - \frac{16}{7} = - 2\frac{2}{7}\]
\[Ответ:\ - 2\frac{2}{7}.\]
\[5)\ 2\frac{1}{7}x = - 1\frac{11}{14}\]
\[x = - \frac{5}{6}\]
\[Ответ:\ - \frac{5}{6}.\]
\[6) - 3,78\ :x = - 0,6\]
\[x = - 3,78\ :( - 0,6)\]
\[x = 6,3\]
\[Ответ:6,3.\]
\[7)\ x\ :\left( - 1\frac{3}{13} \right) = - 0,26\]
\[x = \frac{8}{25} = 0,32\]
\[Ответ:0,32.\]
\[8)\ 18\ :( - x) = 0,6\]
\[- x = 18\ :0,6 = 30\]
\[x = - 30\]
\[Ответ:\ - 30.\]