Question
Answer
$$7z+4\cdot(4-2z)=-z+16$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}7z+4\cdot(4-2z)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7z+16-8z \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-z+16\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{4} $ by $ \left( 4-2z\right) $ $$ \color{blue}{4} \cdot \left( 4-2z\right) = 16-8z $$ |
| ② | Combine like terms: $$ \color{blue}{7z} +16 \color{blue}{-8z} = \color{blue}{-z} +16 $$ |
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