F(n)=-3n-4

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Solution for F(n)=-3n-4 equation: 



(F)=-3F-4

We move all terms to the left:

(F)-(-3F-4)=0

We get rid of parentheses

F+3F+4=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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