21=8v-2=v

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Solution for 21=8v-2=v equation: 



21=8v-2=v

We move all terms to the left:

21-(8v-2)=0

We get rid of parentheses

-8v+2+21=0

We add all the numbers together, and all the variables

-8v+23=0

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

-8v=-23

v=-23/-8

v=2+7/8

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