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(F)=6^3-9F+4
We move all terms to the left:
(F)-(6^3-9F+4)=0
We get rid of parentheses
F+9F-4-6^3=0
We add all the numbers together, and all the variables
10F-220=0
We move all terms containing F to the left, all other terms to the right
10F=220
F=220/10
F=22
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