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(F)=-9F-1
We move all terms to the left:
(F)-(-9F-1)=0
We get rid of parentheses
F+9F+1=0
We add all the numbers together, and all the variables
10F+1=0
We move all terms containing F to the left, all other terms to the right
10F=-1
F=-1/10
F=-1/10
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