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(F)=-3.1F+5
We move all terms to the left:
(F)-(-3.1F+5)=0
We get rid of parentheses
F+3.1F-5=0
We add all the numbers together, and all the variables
4.1F-5=0
We move all terms containing F to the left, all other terms to the right
4.1F=5
F=5/4.1
F=1+0.9/4.1
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