21/7=7/x

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Solution for 21/7=7/x equation: 



21/7=7/x

We move all terms to the left:

21/7-(7/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

-(+7/x)+21/7=0

We add all the numbers together, and all the variables

-(+7/x)+3=0

We get rid of parentheses

-7/x+3=0

We multiply all the terms by the denominator


3*x-7=0

We add all the numbers together, and all the variables

3x-7=0

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

3x=7

x=7/3

x=2+1/3

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