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-(+4)=K
We move all terms to the left:
-(+4)-(K)=0
We add all the numbers together, and all the variables
-K-4=0
We add all the numbers together, and all the variables
-1K-4=0
We move all terms containing K to the left, all other terms to the right
-K=4
K=4/-1
K=-4
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