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(0)=-3F+19
We move all terms to the left:
(0)-(-3F+19)=0
We add all the numbers together, and all the variables
-(-3F+19)=0
We get rid of parentheses
3F-19=0
We move all terms containing F to the left, all other terms to the right
3F=19
F=19/3
F=6+1/3
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