| $$ \begin{aligned}3+r-25& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}r-22\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3} +r \color{blue}{-25} = r \color{blue}{-22} $$ |