-5v+21=2(5-8v)

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Solution for -5v+21=2(5-8v) equation: 



-5v+21=2(5-8v)

We move all terms to the left:

-5v+21-(2(5-8v))=0

We add all the numbers together, and all the variables

-5v-(2(-8v+5))+21=0



We calculate terms in parentheses: -(2(-8v+5)), so:

2(-8v+5)

We multiply parentheses

-16v+10

Back to the equation:

-(-16v+10)



We get rid of parentheses

-5v+16v-10+21=0

We add all the numbers together, and all the variables

11v+11=0

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

11v=-11

v=-11/11

v=-1

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