3/7=a/21=

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Solution for 3/7=a/21= equation: 



3/7=a/21=

We move all terms to the left:

3/7-(a/21)=0

We add all the numbers together, and all the variables

-(+a/21)+3/7=0

We get rid of parentheses

-a/21+3/7=0

We calculate fractions

There is no solution for this equation

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