Answer
$$-8x+x+(-2x)=-9x$$
Explanation
| $$ \begin{aligned}-8x+x+(-2x)& \xlongequal{ }-8x+x-2x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-9x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-8x} + \color{red}{x} \color{red}{-2x} = \color{red}{-9x} $$ |
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