-129=2v-7(7-2v)

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Solution for -129=2v-7(7-2v) equation: 



-129=2v-7(7-2v)

We move all terms to the left:

-129-(2v-7(7-2v))=0

We add all the numbers together, and all the variables

-(2v-7(-2v+7))-129=0



We calculate terms in parentheses: -(2v-7(-2v+7)), so:

2v-7(-2v+7)

We multiply parentheses

2v+14v-49

We add all the numbers together, and all the variables

16v-49

Back to the equation:

-(16v-49)



We get rid of parentheses

-16v+49-129=0

We add all the numbers together, and all the variables

-16v-80=0

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

-16v=80

v=80/-16

v=-5

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