v=9-2v

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Solution for v=9-2v equation: 



v=9-2v

We move all terms to the left:

v-(9-2v)=0

We add all the numbers together, and all the variables

v-(-2v+9)=0

We get rid of parentheses

v+2v-9=0

We add all the numbers together, and all the variables

3v-9=0

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

3v=9

v=9/3

v=3

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