4=5-v

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Solution for 4=5-v equation: 



4=5-v

We move all terms to the left:

4-(5-v)=0

We add all the numbers together, and all the variables

-(-1v+5)+4=0

We get rid of parentheses

1v-5+4=0

We add all the numbers together, and all the variables

v-1=0

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

v=1

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