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=250+30K
We move all terms to the left:
-(250+30K)=0
We add all the numbers together, and all the variables
-(30K+250)=0
We get rid of parentheses
-30K-250=0
We move all terms containing K to the left, all other terms to the right
-30K=250
K=250/-30
K=-8+1/3
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