| $$ \begin{aligned}7x+2+3+4x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}11x+5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7x} + \color{red}{2} + \color{red}{3} + \color{blue}{4x} = \color{blue}{11x} + \color{red}{5} $$ |