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=-2(7+2K)
We move all terms to the left:
-(-2(7+2K))=0
We add all the numbers together, and all the variables
-(-2(2K+7))=0
We calculate terms in parentheses: -(-2(2K+7)), so:We get rid of parentheses
-2(2K+7)
We multiply parentheses
-4K-14
Back to the equation:
-(-4K-14)
4K+14=0
We move all terms containing K to the left, all other terms to the right
4K=-14
K=-14/4
K=-3+1/2
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