F(-1)=8-3x

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Solution for F(-1)=8-3x equation: 



(-1)=8-3F

We move all terms to the left:

(-1)-(8-3F)=0

We add all the numbers together, and all the variables

-(-3F+8)+(-1)=0

We add all the numbers together, and all the variables

-(-3F+8)-1=0

We get rid of parentheses

3F-8-1=0

We add all the numbers together, and all the variables

3F-9=0

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

3F=9

F=9/3

F=3

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