81=-9+5v

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Solution for 81=-9+5v equation: 



81=-9+5v

We move all terms to the left:

81-(-9+5v)=0

We add all the numbers together, and all the variables

-(5v-9)+81=0

We get rid of parentheses

-5v+9+81=0

We add all the numbers together, and all the variables

-5v+90=0

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

-5v=-90

v=-90/-5

v=+18

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