7(v-1)=21

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Solution for 7(v-1)=21 equation: 



7(v-1)=21

We move all terms to the left:

7(v-1)-(21)=0

We multiply parentheses

7v-7-21=0

We add all the numbers together, and all the variables

7v-28=0

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

7v=28

v=28/7

v=4

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