\[\boxed{\text{388\ (388).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ (18x - 36)(x - 7) > 0\]
\[18 \cdot (x - 2)(x - 7) > 0\]
\[x \in ( - \infty;2) \cup (7; + \infty).\]
\[\textbf{б)}\ (x - 7,3)(9,8 - x) > 0\]
\[(x - 7,3)(x - 9,8) < 0\]
\[x \in (7,3;9,8).\]
\[\textbf{в)}\ (x + 0,8)(4 - x)(x - 20) < 0\]
\[(x + 0,8)(x - 4)(x - 20) > 0\]
\[x \in ( - 0,8;4) \cup (20; + \infty).\]
\[\textbf{г)}\ (10x + 3)(17 - x)(x - 5) \geq 0\]
\[10 \cdot (x + 0,3)(x - 5)(x - 17) \leq 0\]
\[x \in ( - \infty; - 0,3\rbrack \cup \lbrack 5;17\rbrack.\ \]