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=6F^-1+2+3F
We move all terms to the left:
-(6F^-1+2+3F)=0
We get rid of parentheses
-6F^-3F+1-2=0
We add all the numbers together, and all the variables
-9F-1=0
We move all terms containing F to the left, all other terms to the right
-9F=1
F=1/-9
F=-1/9
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