9=2v-(-1)

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Solution for 9=2v-(-1) equation: 



9=2v-(-1)

We move all terms to the left:

9-(2v-(-1))=0



We calculate terms in parentheses: -(2v-(-1)), so:

2v-(-1)

We add all the numbers together, and all the variables

2v+1

Back to the equation:

-(2v+1)



We get rid of parentheses

-2v-1+9=0

We add all the numbers together, and all the variables

-2v+8=0

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

-2v=-8

v=-8/-2

v=+4

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