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(e+7)/2=12/2
We move all terms to the left:
(e+7)/2-(12/2)=0
We add all the numbers together, and all the variables
(e+7)/2-6=0
We multiply all the terms by the denominator
(e+7)-6*2=0
We add all the numbers together, and all the variables
(e+7)-12=0
We get rid of parentheses
e+7-12=0
We add all the numbers together, and all the variables
e-5=0
We move all terms containing e to the left, all other terms to the right
e=5
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