-40=-2(v+10)

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Solution for -40=-2(v+10) equation: 



-40=-2(v+10)

We move all terms to the left:

-40-(-2(v+10))=0



We calculate terms in parentheses: -(-2(v+10)), so:

-2(v+10)

We multiply parentheses

-2v-20

Back to the equation:

-(-2v-20)



We get rid of parentheses

2v+20-40=0

We add all the numbers together, and all the variables

2v-20=0

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

2v=20

v=20/2

v=10

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