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(F)=3.5F-5
We move all terms to the left:
(F)-(3.5F-5)=0
We get rid of parentheses
F-3.5F+5=0
We add all the numbers together, and all the variables
-2.5F+5=0
We move all terms containing F to the left, all other terms to the right
-2.5F=-5
F=-5/-2.5
F=+2
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