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(0)=-0.8F+2
We move all terms to the left:
(0)-(-0.8F+2)=0
We add all the numbers together, and all the variables
-(-0.8F+2)=0
We get rid of parentheses
0.8F-2=0
We move all terms containing F to the left, all other terms to the right
0.8F=2
F=2/0.8
F=2+0.4/0.8
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