f-1(-4)=-2f(-2)

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Solution for f-1(-4)=-2f(-2) equation: 



f-1(-4)=-2f(-2)

We move all terms to the left:

f-1(-4)-(-2f(-2))=0

We add all the numbers together, and all the variables

f-(-2f(-2))+4=0



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

-2f(-2)

We multiply parentheses

4f

Back to the equation:

-(4f)



We add all the numbers together, and all the variables

-3f+4=0

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

-3f=-4

f=-4/-3

f=1+1/3

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