4=20-2v

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Solution for 4=20-2v equation: 



4=20-2v

We move all terms to the left:

4-(20-2v)=0

We add all the numbers together, and all the variables

-(-2v+20)+4=0

We get rid of parentheses

2v-20+4=0

We add all the numbers together, and all the variables

2v-16=0

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

2v=16

v=16/2

v=8

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