18=9v-7v

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Solution for 18=9v-7v equation: 



18=9v-7v

We move all terms to the left:

18-(9v-7v)=0

We add all the numbers together, and all the variables

-(+2v)+18=0

We get rid of parentheses

-2v+18=0

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

-2v=-18

v=-18/-2

v=+9

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