\[\boxed{\text{362\ (362).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 0,4x \cdot (5x - 6) + 7,2 =\]
\[= 2x \cdot (x + 0,6)\]
\[- 3,6x = - 7,2\]
\[x = 2.\]
\[Ответ:x = 2.\]
\[2)\ x \cdot (3x + 2) - 9 \cdot \left( x^{2} - 7x \right) =\]
\[= 6x \cdot (10 - x)\]
\[5x = 0\]
\[x = 0\]
\[Ответ:x = 0.\]
\[5x = 30\]
\[x = 6.\]
\[Ответ:x = 6.\ \]