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4.95+3f=13.92
We move all terms to the left:
4.95+3f-(13.92)=0
We add all the numbers together, and all the variables
3f-8.97=0
We move all terms containing f to the left, all other terms to the right
3f=8.97
f=8.97/3
f=2+2.97/3
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