220=131-v

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Solution for 220=131-v equation: 



220=131-v

We move all terms to the left:

220-(131-v)=0

We add all the numbers together, and all the variables

-(-1v+131)+220=0

We get rid of parentheses

1v-131+220=0

We add all the numbers together, and all the variables

v+89=0

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

v=-89

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