| $$ \begin{aligned}-4y+6-12y-8& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-16y-2\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-4y} + \color{red}{6} \color{blue}{-12y} \color{red}{-8} = \color{blue}{-16y} \color{red}{-2} $$ |