-21=3(1-8v)

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Solution for -21=3(1-8v) equation: 



-21=3(1-8v)

We move all terms to the left:

-21-(3(1-8v))=0

We add all the numbers together, and all the variables

-(3(-8v+1))-21=0



We calculate terms in parentheses: -(3(-8v+1)), so:

3(-8v+1)

We multiply parentheses

-24v+3

Back to the equation:

-(-24v+3)



We get rid of parentheses

24v-3-21=0

We add all the numbers together, and all the variables

24v-24=0

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

24v=24

v=24/24

v=1

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