5=21/7x

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Solution for 5=21/7x equation: 



5=21/7x

We move all terms to the left:

5-(21/7x)=0



Domain of the equation: 7x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+21/7x)+5=0

We get rid of parentheses

-21/7x+5=0

We multiply all the terms by the denominator


5*7x-21=0

Wy multiply elements

35x-21=0

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

35x=21

x=21/35

x=3/5

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