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

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



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

We move all terms to the left:

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



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

-5v+3(v-3)

We multiply parentheses

-5v+3v-9

We add all the numbers together, and all the variables

-2v-9

Back to the equation:

-(-2v-9)



We get rid of parentheses

2v+9-21=0

We add all the numbers together, and all the variables

2v-12=0

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

2v=12

v=12/2

v=6

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