20=k-7

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Solution for 20=k-7 equation: 



20=k-7

We move all terms to the left:

20-(k-7)=0

We get rid of parentheses

-k+7+20=0

We add all the numbers together, and all the variables

-1k+27=0

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

-k=-27

k=-27/-1

k=+27

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