$$ \begin{aligned}8+5+7i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7i+13\end{aligned} $$ | |
① | Combine like terms: $$ \color{blue}{8} + \color{blue}{5} +7i = 7i+ \color{blue}{13} $$ |