-17f+8f+12=3+9(-2f-9)

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Solution for -17f+8f+12=3+9(-2f-9) equation: 



-17f+8f+12=3+9(-2f-9)

We move all terms to the left:

-17f+8f+12-(3+9(-2f-9))=0

We add all the numbers together, and all the variables

-9f-(3+9(-2f-9))+12=0



We calculate terms in parentheses: -(3+9(-2f-9)), so:

3+9(-2f-9)

determiningTheFunctionDomain
9(-2f-9)+3

We multiply parentheses

-18f-81+3

We add all the numbers together, and all the variables

-18f-78

Back to the equation:

-(-18f-78)



We get rid of parentheses

-9f+18f+78+12=0

We add all the numbers together, and all the variables

9f+90=0

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

9f=-90

f=-90/9

f=-10

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