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27-3e=18*
We move all terms to the left:
27-3e-(18*)=0
We add all the numbers together, and all the variables
-3e+27-0=0
We add all the numbers together, and all the variables
-3e+27=0
We move all terms containing e to the left, all other terms to the right
-3e=-27
e=-27/-3
e=+9
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