42=15v-8v

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Solution for 42=15v-8v equation: 



42=15v-8v

We move all terms to the left:

42-(15v-8v)=0

We add all the numbers together, and all the variables

-(+7v)+42=0

We get rid of parentheses

-7v+42=0

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

-7v=-42

v=-42/-7

v=+6

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