| $$ \begin{aligned}9+6i+5+i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7i+14\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{9} + \color{red}{6i} + \color{blue}{5} + \color{red}{i} = \color{red}{7i} + \color{blue}{14} $$ |