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-4e-3=-3e-10
We move all terms to the left:
-4e-3-(-3e-10)=0
We get rid of parentheses
-4e+3e+10-3=0
We add all the numbers together, and all the variables
-1e+7=0
We move all terms containing e to the left, all other terms to the right
-e=-7
e=-7/-1
e=+7
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