| $$ \begin{aligned}6+2.5j& \xlongequal{ }6+2j \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2j+6\end{aligned} $$ | |
| ① | Combine like terms: $$ 2j+6 = 2j+6 $$ |