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5e+2=3e+7
We move all terms to the left:
5e+2-(3e+7)=0
We get rid of parentheses
5e-3e-7+2=0
We add all the numbers together, and all the variables
2e-5=0
We move all terms containing e to the left, all other terms to the right
2e=5
e=5/2
e=2+1/2
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