-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-11=0

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

-k=11

k=11/-1

k=-11

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