v-9=4v-81

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Solution for v-9=4v-81 equation: 



v-9=4v-81

We move all terms to the left:

v-9-(4v-81)=0

We get rid of parentheses

v-4v+81-9=0

We add all the numbers together, and all the variables

-3v+72=0

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

-3v=-72

v=-72/-3

v=+24

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