2v-5v=21

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Solution for 2v-5v=21 equation: 



2v-5v=21

We move all terms to the left:

2v-5v-(21)=0

We add all the numbers together, and all the variables

-3v-21=0

We move all terms containing v to the left, all other terms to the right

-3v=21

v=21/-3

v=-7

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