9=7-8v

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Solution for 9=7-8v equation: 



9=7-8v

We move all terms to the left:

9-(7-8v)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

8v-7+9=0

We add all the numbers together, and all the variables

8v+2=0

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

8v=-2

v=-2/8

v=-1/4

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