20=9v-5v

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Solution for 20=9v-5v equation: 



20=9v-5v

We move all terms to the left:

20-(9v-5v)=0

We add all the numbers together, and all the variables

-(+4v)+20=0

We get rid of parentheses

-4v+20=0

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

-4v=-20

v=-20/-4

v=+5

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