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85=7+6(2k-1)
We move all terms to the left:
85-(7+6(2k-1))=0
We calculate terms in parentheses: -(7+6(2k-1)), so:We get rid of parentheses
7+6(2k-1)
determiningTheFunctionDomain 6(2k-1)+7
We multiply parentheses
12k-6+7
We add all the numbers together, and all the variables
12k+1
Back to the equation:
-(12k+1)
-12k-1+85=0
We add all the numbers together, and all the variables
-12k+84=0
We move all terms containing k to the left, all other terms to the right
-12k=-84
k=-84/-12
k=+7
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