10v-9=21

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Solution for 10v-9=21 equation: 



10v-9=21

We move all terms to the left:

10v-9-(21)=0

We add all the numbers together, and all the variables

10v-30=0

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

10v=30

v=30/10

v=3

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