-21+4v=-(1+v)

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Solution for -21+4v=-(1+v) equation: 



-21+4v=-(1+v)

We move all terms to the left:

-21+4v-(-(1+v))=0

We add all the numbers together, and all the variables

4v-(-(v+1))-21=0



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

-(v+1)

We get rid of parentheses

-v-1

We add all the numbers together, and all the variables

-1v-1

Back to the equation:

-(-1v-1)



We get rid of parentheses

4v+1v+1-21=0

We add all the numbers together, and all the variables

5v-20=0

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

5v=20

v=20/5

v=4

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