| $$ \begin{aligned}3^{5x-3x}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3^{2x}\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{5x} \color{blue}{-3x} = \color{blue}{2x} $$ |