7v-21=3+v

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Solution for 7v-21=3+v equation: 



7v-21=3+v

We move all terms to the left:

7v-21-(3+v)=0

We add all the numbers together, and all the variables

7v-(v+3)-21=0

We get rid of parentheses

7v-v-3-21=0

We add all the numbers together, and all the variables

6v-24=0

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

6v=24

v=24/6

v=4

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