Question
Answer
$$r-4r-12=-3r-12$$
Explanation
| $$ \begin{aligned}r-4r-12& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-3r-12\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{r} \color{blue}{-4r} -12 = \color{blue}{-3r} -12 $$ |
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