7(k-20)=7

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Solution for 7(k-20)=7 equation: 



7(k-20)=7

We move all terms to the left:

7(k-20)-(7)=0

We multiply parentheses

7k-140-7=0

We add all the numbers together, and all the variables

7k-147=0

We move all terms containing k to the left, all other terms to the right

7k=147

k=147/7

k=21

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