7v-21=7

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Solution for 7v-21=7 equation: 



7v-21=7

We move all terms to the left:

7v-21-(7)=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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