\[(12y + 18) \cdot (1,6 - 0,2y) = 0\]
\[12y + 18 = 0\ \ \ \ \ \ \ \ \ или\ \ \ \ \ \ \ 1,6 - 0,2y = 0\]
\[12y = - 18\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 0,2y = 1,6\]
\[y = - \frac{18}{12}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ y = 8.\]
\[y = - \frac{3}{2}\]
\[y = - 1,5.\]
\[Ответ:\ y = - 1,5;y = 8.\ \]