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-15=k(-9)
We move all terms to the left:
-15-(k(-9))=0
We calculate terms in parentheses: -(k(-9)), so:We get rid of parentheses
k(-9)
We multiply parentheses
-9k
Back to the equation:
-(-9k)
9k-15=0
We move all terms containing k to the left, all other terms to the right
9k=15
k=15/9
k=1+2/3
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