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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

f(-4)+17=0

We multiply parentheses

-4f+17=0

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

-4f=-17

f=-17/-4

f=4+1/4

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