90=-3(5+7v)

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Solution for 90=-3(5+7v) equation: 



90=-3(5+7v)

We move all terms to the left:

90-(-3(5+7v))=0

We add all the numbers together, and all the variables

-(-3(7v+5))+90=0



We calculate terms in parentheses: -(-3(7v+5)), so:

-3(7v+5)

We multiply parentheses

-21v-15

Back to the equation:

-(-21v-15)



We get rid of parentheses

21v+15+90=0

We add all the numbers together, and all the variables

21v+105=0

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

21v=-105

v=-105/21

v=-5

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