f(-3)=-3(-3)-1

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Solution for f(-3)=-3(-3)-1 equation: 



f(-3)=-3(-3)-1

We move all terms to the left:

f(-3)-(-3(-3)-1)=0

We add all the numbers together, and all the variables

f(-3)-8=0

We multiply parentheses

-3f-8=0

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

-3f=8

f=8/-3

f=-2+2/3

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