Answer
$$2(5z-3)-2z=8z-6$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2(5z-3)-2z& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}10z-6-2z \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}8z-6\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{2} $ by $ \left( 5z-3\right) $ $$ \color{blue}{2} \cdot \left( 5z-3\right) = 10z-6 $$ |
| ② | Combine like terms: $$ \color{blue}{10z} -6 \color{blue}{-2z} = \color{blue}{8z} -6 $$ |
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