-7f-7=9+f

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Solution for -7f-7=9+f equation: 



-7f-7=9+f

We move all terms to the left:

-7f-7-(9+f)=0

We add all the numbers together, and all the variables

-7f-(f+9)-7=0

We get rid of parentheses

-7f-f-9-7=0

We add all the numbers together, and all the variables

-8f-16=0

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

-8f=16

f=16/-8

f=-2

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