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15=k/2+11
We move all terms to the left:
15-(k/2+11)=0
We get rid of parentheses
-k/2-11+15=0
We multiply all the terms by the denominator
-k-11*2+15*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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