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