21/56=20/d

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Solution for 21/56=20/d equation: 



21/56=20/d

We move all terms to the left:

21/56-(20/d)=0



Domain of the equation: d)!=0

d!=0/1

d!=0

d∈R



We add all the numbers together, and all the variables

-(+20/d)+21/56=0

We get rid of parentheses

-20/d+21/56=0

We calculate fractions

There is no solution for this equation

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