| $$ \begin{aligned}-x+5+10x+6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9x+11\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-x} + \color{red}{5} + \color{blue}{10x} + \color{red}{6} = \color{blue}{9x} + \color{red}{11} $$ |