-9-9f=8(-9f-9)

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Solution for -9-9f=8(-9f-9) equation: 



-9-9f=8(-9f-9)

We move all terms to the left:

-9-9f-(8(-9f-9))=0



We calculate terms in parentheses: -(8(-9f-9)), so:

8(-9f-9)

We multiply parentheses

-72f-72

Back to the equation:

-(-72f-72)



We get rid of parentheses

-9f+72f+72-9=0

We add all the numbers together, and all the variables

63f+63=0

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

63f=-63

f=-63/63

f=-1

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