\[(16y - 24)(1,2 + 0,4y) = 0\]
\[16y - 24 = 0\ \ \ \ \ \ \ \ \ 1,2 + 0,4y = 0\]
\[16y = 24\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 0,4y = - 1,2\]
\[y = \frac{24}{16}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ y = - \frac{12}{4}\]
\[y = 1,5\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ y = - 3\]
\[Ответ:y = - 3;\ \ y = 1,5.\]