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k/2+15=55
We move all terms to the left:
k/2+15-(55)=0
We add all the numbers together, and all the variables
k/2-40=0
We multiply all the terms by the denominator
k-40*2=0
We add all the numbers together, and all the variables
k-80=0
We move all terms containing k to the left, all other terms to the right
k=80
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