f(-2)=(-2)-3

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Solution for f(-2)=(-2)-3 equation: 



f(-2)=(-2)-3

We move all terms to the left:

f(-2)-((-2)-3)=0

We add all the numbers together, and all the variables

f(-2)+5=0

We multiply parentheses

-2f+5=0

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

-2f=-5

f=-5/-2

f=2+1/2

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