21=1/3f

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Solution for 21=1/3f equation: 



21=1/3f

We move all terms to the left:

21-(1/3f)=0



Domain of the equation: 3f)!=0

f!=0/1

f!=0

f∈R



We add all the numbers together, and all the variables

-(+1/3f)+21=0

We get rid of parentheses

-1/3f+21=0

We multiply all the terms by the denominator


21*3f-1=0

Wy multiply elements

63f-1=0

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

63f=1

f=1/63

f=1/63

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