21/v=7

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Solution for 21/v=7 equation: 



21/v=7

We move all terms to the left:

21/v-(7)=0



Domain of the equation: v!=0

v∈R



We multiply all the terms by the denominator


-7*v+21=0

We add all the numbers together, and all the variables

-7v+21=0

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

-7v=-21

v=-21/-7

v=+3

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