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-8=13+4K
We move all terms to the left:
-8-(13+4K)=0
We add all the numbers together, and all the variables
-(4K+13)-8=0
We get rid of parentheses
-4K-13-8=0
We add all the numbers together, and all the variables
-4K-21=0
We move all terms containing K to the left, all other terms to the right
-4K=21
K=21/-4
K=-5+1/4
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