20=k-9

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Solution for 20=k-9 equation: 



20=k-9

We move all terms to the left:

20-(k-9)=0

We get rid of parentheses

-k+9+20=0

We add all the numbers together, and all the variables

-1k+29=0

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

-k=-29

k=-29/-1

k=+29

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