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-102=-6(k+7)
We move all terms to the left:
-102-(-6(k+7))=0
We calculate terms in parentheses: -(-6(k+7)), so:We get rid of parentheses
-6(k+7)
We multiply parentheses
-6k-42
Back to the equation:
-(-6k-42)
6k+42-102=0
We add all the numbers together, and all the variables
6k-60=0
We move all terms containing k to the left, all other terms to the right
6k=60
k=60/6
k=10
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