f/21=39

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Solution for f/21=39 equation: 



f/21=39

We move all terms to the left:

f/21-(39)=0

We multiply all the terms by the denominator


f-39*21=0

We add all the numbers together, and all the variables

f-819=0

We move all terms containing f to the left, all other terms to the right

f=819

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