7e-9=40

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Solution for 7e-9=40 equation: 



7e-9=40

We move all terms to the left:

7e-9-(40)=0

We add all the numbers together, and all the variables

7e-49=0

We move all terms containing e to the left, all other terms to the right

7e=49

e=49/7

e=7

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