4v=40-v

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Solution for 4v=40-v equation: 



4v=40-v

We move all terms to the left:

4v-(40-v)=0

We add all the numbers together, and all the variables

4v-(-1v+40)=0

We get rid of parentheses

4v+1v-40=0

We add all the numbers together, and all the variables

5v-40=0

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

5v=40

v=40/5

v=8

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