7v-21=(v-4)+7

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Solution for 7v-21=(v-4)+7 equation: 



7v-21=(v-4)+7

We move all terms to the left:

7v-21-((v-4)+7)=0



We calculate terms in parentheses: -((v-4)+7), so:

(v-4)+7

We get rid of parentheses

v-4+7

We add all the numbers together, and all the variables

v+3

Back to the equation:

-(v+3)



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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