Question
Answer
$$2n\cdot2+8n-n\cdot2-1-n\cdot2-7n-11-n\cdot2=-n-12$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2n\cdot2+8n-n\cdot2-1-n\cdot2-7n-11-n\cdot2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4n+8n-2n-1-2n-7n-11-2n \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-n-12\end{aligned} $$ | |
| ① | $$ 2 n \cdot 2 = 4 n $$ |
| ② | Combine like terms: $$ \color{blue}{4n} + \color{red}{8n} \color{green}{-2n} \color{orange}{-1} \color{blue}{-2n} \color{red}{-7n} \color{orange}{-11} \color{red}{-2n} = \color{red}{-n} \color{orange}{-12} $$ |
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Simplify Rational Expressions