| $$ \begin{aligned}-6+9.5& \xlongequal{ }-6+9 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-6} + \color{blue}{9} = \color{blue}{3} $$ |