7-9v=-8v

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Solution for 7-9v=-8v equation: 



7-9v=-8v

We move all terms to the left:

7-9v-(-8v)=0

We get rid of parentheses

-9v+8v+7=0

We add all the numbers together, and all the variables

-1v+7=0

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

-v=-7

v=-7/-1

v=+7

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