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27=k/(3^2)
We move all terms to the left:
27-(k/(3^2))=0
We get rid of parentheses
-k/3^2+27=0
We multiply all the terms by the denominator
-k+27*3^2=0
We add all the numbers together, and all the variables
-1k+243=0
We move all terms containing k to the left, all other terms to the right
-k=-243
k=-243/-1
k=+243
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