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4=k/2-5
We move all terms to the left:
4-(k/2-5)=0
We get rid of parentheses
-k/2+5+4=0
We multiply all the terms by the denominator
-k+5*2+4*2=0
We add all the numbers together, and all the variables
-1k+18=0
We move all terms containing k to the left, all other terms to the right
-k=-18
k=-18/-1
k=+18
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