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(F)=4F-2=18
We move all terms to the left:
(F)-(4F-2)=0
We get rid of parentheses
F-4F+2=0
We add all the numbers together, and all the variables
-3F+2=0
We move all terms containing F to the left, all other terms to the right
-3F=-2
F=-2/-3
F=2/3
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