72=5v+4v

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Solution for 72=5v+4v equation: 



72=5v+4v

We move all terms to the left:

72-(5v+4v)=0

We add all the numbers together, and all the variables

-(+9v)+72=0

We get rid of parentheses

-9v+72=0

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

-9v=-72

v=-72/-9

v=+8

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