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(F)=7F-5.F=5
We move all terms to the left:
(F)-(7F-5.F)=0
We add all the numbers together, and all the variables
F-(+2F)=0
We get rid of parentheses
F-2F=0
We add all the numbers together, and all the variables
-F=0
F=0/-1
F=0
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