F(-5)=-4x-9

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Solution for F(-5)=-4x-9 equation: 



(-5)=-4F-9

We move all terms to the left:

(-5)-(-4F-9)=0

We add all the numbers together, and all the variables

-(-4F-9)-5=0

We get rid of parentheses

4F+9-5=0

We add all the numbers together, and all the variables

4F+4=0

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

4F=-4

F=-4/4

F=-1

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