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3(e+15)+4(11-e)=0
We add all the numbers together, and all the variables
3(e+15)+4(-1e+11)=0
We multiply parentheses
3e-4e+45+44=0
We add all the numbers together, and all the variables
-1e+89=0
We move all terms containing e to the left, all other terms to the right
-e=-89
e=-89/-1
e=+89
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