| $$ \begin{aligned}5t-3+34t+7& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}39t+4\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{5t} \color{red}{-3} + \color{blue}{34t} + \color{red}{7} = \color{blue}{39t} + \color{red}{4} $$ |