21-7v=28

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Solution for 21-7v=28 equation: 



21-7v=28

We move all terms to the left:

21-7v-(28)=0

We add all the numbers together, and all the variables

-7v-7=0

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

-7v=7

v=7/-7

v=-1

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