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8-k/3=1
We move all terms to the left:
8-k/3-(1)=0
We add all the numbers together, and all the variables
-k/3+7=0
We multiply all the terms by the denominator
-k+7*3=0
We add all the numbers together, and all the variables
-1k+21=0
We move all terms containing k to the left, all other terms to the right
-k=-21
k=-21/-1
k=+21
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