| $$ \begin{aligned}-6x+4+2x+7& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-4x+11\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-6x} + \color{red}{4} + \color{blue}{2x} + \color{red}{7} = \color{blue}{-4x} + \color{red}{11} $$ |