-21=3(v-5)-6v

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Solution for -21=3(v-5)-6v equation: 



-21=3(v-5)-6v

We move all terms to the left:

-21-(3(v-5)-6v)=0



We calculate terms in parentheses: -(3(v-5)-6v), so:

3(v-5)-6v

We add all the numbers together, and all the variables

-6v+3(v-5)

We multiply parentheses

-6v+3v-15

We add all the numbers together, and all the variables

-3v-15

Back to the equation:

-(-3v-15)



We get rid of parentheses

3v+15-21=0

We add all the numbers together, and all the variables

3v-6=0

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

3v=6

v=6/3

v=2

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