\[5x - 3a = 2\]
\[5x = 2 + 3a\]
\[x = \frac{2 + 3a}{5}\]
\[1 < \frac{2 + 3a}{5} < 2\]
\[5 < 2 + 3a < 10\]
\[5 - 2 < 3a < 10 - 2\]
\[3 < 3a < 8\]
\[1 < a < \frac{8}{3}\]
\[1 < a < 2\frac{2}{3}.\]