-144=3+21v

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Solution for -144=3+21v equation: 



-144=3+21v

We move all terms to the left:

-144-(3+21v)=0

We add all the numbers together, and all the variables

-(21v+3)-144=0

We get rid of parentheses

-21v-3-144=0

We add all the numbers together, and all the variables

-21v-147=0

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

-21v=147

v=147/-21

v=-7

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