-21=5+7v+6v

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Solution for -21=5+7v+6v equation: 



-21=5+7v+6v

We move all terms to the left:

-21-(5+7v+6v)=0

We add all the numbers together, and all the variables

-(13v+5)-21=0

We get rid of parentheses

-13v-5-21=0

We add all the numbers together, and all the variables

-13v-26=0

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

-13v=26

v=26/-13

v=-2

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