F=8-2x

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Solution for F=8-2x equation: 



=8-2F

We move all terms to the left:

-(8-2F)=0

We add all the numbers together, and all the variables

-(-2F+8)=0

We get rid of parentheses

2F-8=0

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

2F=8

F=8/2

F=4

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