-7e+4e=-9

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Solution for -7e+4e=-9 equation: 



-7e+4e=-9

We move all terms to the left:

-7e+4e-(-9)=0

We add all the numbers together, and all the variables

-3e+9=0

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

-3e=-9

e=-9/-3

e=+3

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