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-12-4e=4-2e
We move all terms to the left:
-12-4e-(4-2e)=0
We add all the numbers together, and all the variables
-4e-(-2e+4)-12=0
We get rid of parentheses
-4e+2e-4-12=0
We add all the numbers together, and all the variables
-2e-16=0
We move all terms containing e to the left, all other terms to the right
-2e=16
e=16/-2
e=-8
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