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-58+7k=2(k-9)
We move all terms to the left:
-58+7k-(2(k-9))=0
We calculate terms in parentheses: -(2(k-9)), so:We get rid of parentheses
2(k-9)
We multiply parentheses
2k-18
Back to the equation:
-(2k-18)
7k-2k+18-58=0
We add all the numbers together, and all the variables
5k-40=0
We move all terms containing k to the left, all other terms to the right
5k=40
k=40/5
k=8
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