3v-v=81-v

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Solution for 3v-v=81-v equation: 



3v-v=81-v

We move all terms to the left:

3v-v-(81-v)=0

We add all the numbers together, and all the variables

3v-v-(-1v+81)=0

We add all the numbers together, and all the variables

2v-(-1v+81)=0

We get rid of parentheses

2v+1v-81=0

We add all the numbers together, and all the variables

3v-81=0

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

3v=81

v=81/3

v=27

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