| $$ \begin{aligned}12+14i+4+6i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}20i+16\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{12} + \color{red}{14i} + \color{blue}{4} + \color{red}{6i} = \color{red}{20i} + \color{blue}{16} $$ |