\[\boxed{\text{942.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\ 2a - 1 < 7 - 1,2a\]
\[2a + 1,2a < 7 + 1\]
\[3,2a < 8\]
\[a < \frac{8}{3,2}\]
\[a < \frac{80}{32}\]
\[a < 2,5\]
\[a \in ( - \infty;2,5)\]
\[\textbf{б)}\ 1,5p - 1 > 1 + 1,1p\]
\[1,5p - 1,1p > 1 + 1\]
\[0,4p > 2\]
\[p > \frac{2}{0,4}\]
\[p > \frac{20}{4}\]
\[p > 5\]
\[p \in (5;\ + \infty)\]