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(F)=13-10F
We move all terms to the left:
(F)-(13-10F)=0
We add all the numbers together, and all the variables
F-(-10F+13)=0
We get rid of parentheses
F+10F-13=0
We add all the numbers together, and all the variables
11F-13=0
We move all terms containing F to the left, all other terms to the right
11F=13
F=13/11
F=1+2/11
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