21=18/x

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Solution for 21=18/x equation: 



21=18/x

We move all terms to the left:

21-(18/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+18/x)+21=0

We get rid of parentheses

-18/x+21=0

We multiply all the terms by the denominator


21*x-18=0

We add all the numbers together, and all the variables

21x-18=0

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

21x=18

x=18/21

x=6/7

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