\[\boxed{\text{43\ (43).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ (4x - 1,6) \cdot (8 + x) = 0\]
\(4x - 1,6 = 0\) \(8 + x = 0\)
\(4x = 1,6\) \(x = - 8\)
\[x = 0,4\]
\[Ответ:\ x = - 8;0,4.\]
\[2)\ x \cdot (5 - 0,2x) = 0\]
\(x = 0\) \(5 - 0,2x = 0\)
\(0,2x = 5\)
\(x = 5\ :0,2\)
\(\ x = 25\)
\[Ответ:x = 0;25.\]
\[3)\ (3x - 2) \cdot \left( 4 + \frac{1}{3}x \right) = 0\]
\(Ответ:x = - 12;\ \ \frac{2}{3}.\)0
\[Ответ:\ x = \ - 1; - 0,6;\ 0,3.\]