8v+(-4v)=20

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Solution for 8v+(-4v)=20 equation: 



8v+(-4v)=20

We move all terms to the left:

8v+(-4v)-(20)=0

We get rid of parentheses

8v-4v-20=0

We add all the numbers together, and all the variables

4v-20=0

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

4v=20

v=20/4

v=5

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