-7-8f=-f

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Solution for -7-8f=-f equation: 



-7-8f=-f

We move all terms to the left:

-7-8f-(-f)=0

We add all the numbers together, and all the variables

-8f-(-1f)-7=0

We get rid of parentheses

-8f+1f-7=0

We add all the numbers together, and all the variables

-7f-7=0

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

-7f=7

f=7/-7

f=-1

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