Question
Answer
$$100-30x-(20x+200)=-50x-100$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}100-30x-(20x+200)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}100-30x-20x-200 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-50x-100\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 20x+200 \right) = -20x-200 $$ |
| ② | Combine like terms: $$ \color{blue}{100} \color{red}{-30x} \color{red}{-20x} \color{blue}{-200} = \color{red}{-50x} \color{blue}{-100} $$ |
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