| $$ \begin{aligned}7-6i+9+11i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5i+16\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7} \color{red}{-6i} + \color{blue}{9} + \color{red}{11i} = \color{red}{5i} + \color{blue}{16} $$ |