F(-4)=-2x+8

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Solution for F(-4)=-2x+8 equation: 



(-4)=-2F+8

We move all terms to the left:

(-4)-(-2F+8)=0

We add all the numbers together, and all the variables

-(-2F+8)-4=0

We get rid of parentheses

2F-8-4=0

We add all the numbers together, and all the variables

2F-12=0

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

2F=12

F=12/2

F=6

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