Answer
$$-7\cdot(2-2k)=14k-14$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-7\cdot(2-2k)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(14-14k) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-14+14k \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}14k-14\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{7} $ by $ \left( 2-2k\right) $ $$ \color{blue}{7} \cdot \left( 2-2k\right) = 14-14k $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left(14-14k \right) = -14+14k $$ |
| ③ | Combine like terms: $$ 14k-14 = 14k-14 $$ |
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