7/4=21/a

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Solution for 7/4=21/a equation: 



7/4=21/a

We move all terms to the left:

7/4-(21/a)=0



Domain of the equation: a)!=0

a!=0/1

a!=0

a∈R



We add all the numbers together, and all the variables

-(+21/a)+7/4=0

We get rid of parentheses

-21/a+7/4=0

We calculate fractions

There is no solution for this equation

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