-7+4v=21

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Solution for -7+4v=21 equation: 



-7+4v=21

We move all terms to the left:

-7+4v-(21)=0

We add all the numbers together, and all the variables

4v-28=0

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

4v=28

v=28/4

v=7

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