9k=20k-k

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Solution for 9k=20k-k equation: 



9k=20k-k

We move all terms to the left:

9k-(20k-k)=0

We add all the numbers together, and all the variables

9k-(+19k)=0

We get rid of parentheses

9k-19k=0

We add all the numbers together, and all the variables

-10k=0

k=0/-10

k=0

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