-20=-9+8(f+6)

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Solution for -20=-9+8(f+6) equation: 



-20=-9+8(f+6)

We move all terms to the left:

-20-(-9+8(f+6))=0



We calculate terms in parentheses: -(-9+8(f+6)), so:

-9+8(f+6)

determiningTheFunctionDomain
8(f+6)-9

We multiply parentheses

8f+48-9

We add all the numbers together, and all the variables

8f+39

Back to the equation:

-(8f+39)



We get rid of parentheses

-8f-39-20=0

We add all the numbers together, and all the variables

-8f-59=0

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

-8f=59

f=59/-8

f=-7+3/8

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