4K-k=-21

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Solution for 4K-k=-21 equation: 



4-K=-21

We move all terms to the left:

4-K-(-21)=0

We add all the numbers together, and all the variables

-1K+25=0

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

-K=-25

K=-25/-1

K=+25

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