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