\[\boxed{\mathbf{36}.}\]
\[1)\ (2a - 3)x = a + 1\]
\[x = \frac{a + 1}{2a - 3}\]
\[2a - 3 = 0\]
\[2a = 3\]
\[a = 1,5.\]
\[Ответ:при\ a = 1,5.\]
\[2)\ (4 - 5a)x = 3 - a\]
\[x = \frac{3 - a}{4 - 5a}\]
\[4 - 5a = 0\]
\[5a = 4\]
\[a = 0,8.\]
\[Ответ:при\ a = 0,8.\]