-81=2(9+v)+7v

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Solution for -81=2(9+v)+7v equation: 



-81=2(9+v)+7v

We move all terms to the left:

-81-(2(9+v)+7v)=0

We add all the numbers together, and all the variables

-(2(v+9)+7v)-81=0



We calculate terms in parentheses: -(2(v+9)+7v), so:

2(v+9)+7v

We add all the numbers together, and all the variables

7v+2(v+9)

We multiply parentheses

7v+2v+18

We add all the numbers together, and all the variables

9v+18

Back to the equation:

-(9v+18)



We get rid of parentheses

-9v-18-81=0

We add all the numbers together, and all the variables

-9v-99=0

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

-9v=99

v=99/-9

v=-11

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