F(-4)=-2x+9

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Solution for F(-4)=-2x+9 equation: 



(-4)=-2F+9

We move all terms to the left:

(-4)-(-2F+9)=0

We add all the numbers together, and all the variables

-(-2F+9)-4=0

We get rid of parentheses

2F-9-4=0

We add all the numbers together, and all the variables

2F-13=0

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

2F=13

F=13/2

F=6+1/2

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