1/9f=21

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Solution for 1/9f=21 equation: 



1/9f=21

We move all terms to the left:

1/9f-(21)=0



Domain of the equation: 9f!=0

f!=0/9

f!=0

f∈R



We multiply all the terms by the denominator


-21*9f+1=0

Wy multiply elements

-189f+1=0

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

-189f=-1

f=-1/-189

f=1/189

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