Question
Answer
$$12s-5-(9s+3t-11)=3s-3t+6$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}12s-5-(9s+3t-11)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}12s-5-9s-3t+11 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3s-3t+6\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 9s+3t-11 \right) = -9s-3t+11 $$ |
| ② | Combine like terms: $$ \color{blue}{12s} \color{red}{-5} \color{blue}{-9s} -3t+ \color{red}{11} = \color{blue}{3s} -3t+ \color{red}{6} $$ |
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