F(-2)=2x+4

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Solution for F(-2)=2x+4 equation: 



(-2)=2F+4

We move all terms to the left:

(-2)-(2F+4)=0

We add all the numbers together, and all the variables

-(2F+4)-2=0

We get rid of parentheses

-2F-4-2=0

We add all the numbers together, and all the variables

-2F-6=0

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

-2F=6

F=6/-2

F=-3

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