| $$ \begin{aligned}5z-8-4z-3z+6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-2z-2\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{5z} \color{red}{-8} \color{green}{-4z} \color{green}{-3z} + \color{red}{6} = \color{green}{-2z} \color{red}{-2} $$ |