$$ \begin{aligned}x+5+4x-7& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5x-2\end{aligned} $$ | |
① | Combine like terms: $$ \color{blue}{x} + \color{red}{5} + \color{blue}{4x} \color{red}{-7} = \color{blue}{5x} \color{red}{-2} $$ |