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-125=7-6(7+3k)
We move all terms to the left:
-125-(7-6(7+3k))=0
We add all the numbers together, and all the variables
-(7-6(3k+7))-125=0
We calculate terms in parentheses: -(7-6(3k+7)), so:We get rid of parentheses
7-6(3k+7)
determiningTheFunctionDomain -6(3k+7)+7
We multiply parentheses
-18k-42+7
We add all the numbers together, and all the variables
-18k-35
Back to the equation:
-(-18k-35)
18k+35-125=0
We add all the numbers together, and all the variables
18k-90=0
We move all terms containing k to the left, all other terms to the right
18k=90
k=90/18
k=5
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