Question
Answer
$$8z+3\cdot(3-3z)=-z+9$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}8z+3\cdot(3-3z)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}8z+9-9z \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-z+9\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3} $ by $ \left( 3-3z\right) $ $$ \color{blue}{3} \cdot \left( 3-3z\right) = 9-9z $$ |
| ② | Combine like terms: $$ \color{blue}{8z} +9 \color{blue}{-9z} = \color{blue}{-z} +9 $$ |
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