-3f=3(-3f+5)=-81

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Solution for -3f=3(-3f+5)=-81 equation: 



-3f=3(-3f+5)=-81

We move all terms to the left:

-3f-(3(-3f+5))=0



We calculate terms in parentheses: -(3(-3f+5)), so:

3(-3f+5)

We multiply parentheses

-9f+15

Back to the equation:

-(-9f+15)



We get rid of parentheses

-3f+9f-15=0

We add all the numbers together, and all the variables

6f-15=0

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

6f=15

f=15/6

f=2+1/2

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