31=5v-9

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Solution for 31=5v-9 equation: 



31=5v-9

We move all terms to the left:

31-(5v-9)=0

We get rid of parentheses

-5v+9+31=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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