-4/7+x=3/21

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Solution for -4/7+x=3/21 equation: 



-4/7+x=3/21

We move all terms to the left:

-4/7+x-(3/21)=0

We add all the numbers together, and all the variables

x-4/7-(+3/21)=0

We get rid of parentheses

x-4/7-3/21=0

We calculate fractions

There is no solution for this equation

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