21-3v=-3v+21

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Solution for 21-3v=-3v+21 equation: 



21-3v=-3v+21

We move all terms to the left:

21-3v-(-3v+21)=0

We get rid of parentheses

-3v+3v-21+21=0

We add all the numbers together, and all the variables

=0

v=0/1

v=0

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