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1.3e+12.8=7.5e+35.6
We move all terms to the left:
1.3e+12.8-(7.5e+35.6)=0
We get rid of parentheses
1.3e-7.5e-35.6+12.8=0
We add all the numbers together, and all the variables
-6.2e-22.8=0
We move all terms containing e to the left, all other terms to the right
-6.2e=22.8
e=22.8/-6.2
e=-3+1.90909090909/2.81818181818
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