3/21=y/7

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Solution for 3/21=y/7 equation: 



3/21=y/7

We move all terms to the left:

3/21-(y/7)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-y/7+3/21=0

We calculate fractions

There is no solution for this equation

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