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72=6(-e-3)
We move all terms to the left:
72-(6(-e-3))=0
We add all the numbers together, and all the variables
-(6(-1e-3))+72=0
We calculate terms in parentheses: -(6(-1e-3)), so:We get rid of parentheses
6(-1e-3)
We multiply parentheses
-6e-18
Back to the equation:
-(-6e-18)
6e+18+72=0
We add all the numbers together, and all the variables
6e+90=0
We move all terms containing e to the left, all other terms to the right
6e=-90
e=-90/6
e=-15
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