21=4/t

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Solution for 21=4/t equation: 



21=4/t

We move all terms to the left:

21-(4/t)=0



Domain of the equation: t)!=0

t!=0/1

t!=0

t∈R



We add all the numbers together, and all the variables

-(+4/t)+21=0

We get rid of parentheses

-4/t+21=0

We multiply all the terms by the denominator


21*t-4=0

We add all the numbers together, and all the variables

21t-4=0

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

21t=4

t=4/21

t=4/21

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