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10e+4=-2e+28
We move all terms to the left:
10e+4-(-2e+28)=0
We get rid of parentheses
10e+2e-28+4=0
We add all the numbers together, and all the variables
12e-24=0
We move all terms containing e to the left, all other terms to the right
12e=24
e=24/12
e=2
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