F(3)=-x-2

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Solution for F(3)=-x-2 equation: 



(3)=-F-2

We move all terms to the left:

(3)-(-F-2)=0

We add all the numbers together, and all the variables

-(-1F-2)+3=0

We get rid of parentheses

1F+2+3=0

We add all the numbers together, and all the variables

F+5=0

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

F=-5

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