$\log _{b,b = 1}^a \Rightarrow \left\{ {\begin{array}{*{20}{c}}{5x - 2 \gt 0 \Rightarrow x \gt \frac{2}{5}II}\\{3 \gt 0I\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\end{array}} \right.$ $ \Rightarrow II \cap I \Rightarrow x \gt \frac{2}{5}$