20=k+7,k

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Solution for 20=k+7,k equation: 



20=k+7.k

We move all terms to the left:

20-(k+7.k)=0

We add all the numbers together, and all the variables

-(+8k)+20=0

We get rid of parentheses

-8k+20=0

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

-8k=-20

k=-20/-8

k=2+1/2

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