\[\boxed{\text{50\ (50).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[x = 16\ :( - 5)\]
\[x = \frac{16}{- 5}\]
\[x = - 3,2.\]
\[x = \frac{1}{5}\ :2\]
\[x = \frac{1}{10}\]
\[x = 0,1.\]
\[x = 4 \cdot 3\]
\[x = 12.\]
\[\textbf{г)}\ 4x = - 2\]
\[x = - 2\ :4\]
\[x = - \frac{2}{4}\]
\[x = - 0,5.\]
\[x = 3\ :0,6\]
\[x = 5.\]
\[x = 5\ :( - 0,7)\]
\[x = 5\ :\left( - \frac{7}{10} \right)\]
\[x = - 5\ \cdot \frac{10}{7}\]
\[x = - \frac{50}{7}\]
\[x = - 7\frac{1}{7}\text{.\ }\]