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5=7-k/2
We move all terms to the left:
5-(7-k/2)=0
We add all the numbers together, and all the variables
-(-k/2+7)+5=0
We get rid of parentheses
k/2-7+5=0
We multiply all the terms by the denominator
k-7*2+5*2=0
We add all the numbers together, and all the variables
k-4=0
We move all terms containing k to the left, all other terms to the right
k=4
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