$$ \begin{aligned}5x-8+7x+10& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}12x+2\end{aligned} $$ | |
① | Combine like terms: $$ \color{blue}{5x} \color{red}{-8} + \color{blue}{7x} + \color{red}{10} = \color{blue}{12x} + \color{red}{2} $$ |