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(1)=-3F+2.5
We move all terms to the left:
(1)-(-3F+2.5)=0
We get rid of parentheses
3F-2.5+1=0
We add all the numbers together, and all the variables
3F-1.5=0
We move all terms containing F to the left, all other terms to the right
3F=1.5
F=1.5/3
F=1/2
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