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12=k/2+8
We move all terms to the left:
12-(k/2+8)=0
We get rid of parentheses
-k/2-8+12=0
We multiply all the terms by the denominator
-k-8*2+12*2=0
We add all the numbers together, and all the variables
-1k+8=0
We move all terms containing k to the left, all other terms to the right
-k=-8
k=-8/-1
k=+8
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