f(-7)=-2-1

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Solution for f(-7)=-2-1 equation: 



f(-7)=-2-1

We move all terms to the left:

f(-7)-(-2-1)=0

We add all the numbers together, and all the variables

f(-7)-(-3)=0

We add all the numbers together, and all the variables

f(-7)+3=0

We multiply parentheses

-7f+3=0

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

-7f=-3

f=-3/-7

f=3/7

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