F(x)=-3x-18

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Solution for F(x)=-3x-18 equation: 



(F)=-3F-18

We move all terms to the left:

(F)-(-3F-18)=0

We get rid of parentheses

F+3F+18=0

We add all the numbers together, and all the variables

4F+18=0

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

4F=-18

F=-18/4

F=-4+1/2

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