13v=21+6v

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Solution for 13v=21+6v equation: 



13v=21+6v

We move all terms to the left:

13v-(21+6v)=0

We add all the numbers together, and all the variables

13v-(6v+21)=0

We get rid of parentheses

13v-6v-21=0

We add all the numbers together, and all the variables

7v-21=0

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

7v=21

v=21/7

v=3

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