21=k-5

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Solution for 21=k-5 equation: 



21=k-5

We move all terms to the left:

21-(k-5)=0

We get rid of parentheses

-k+5+21=0

We add all the numbers together, and all the variables

-1k+26=0

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

-k=-26

k=-26/-1

k=+26

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