-1=8v-7v

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Solution for -1=8v-7v equation: 



-1=8v-7v

We move all terms to the left:

-1-(8v-7v)=0

We add all the numbers together, and all the variables

-(+v)-1=0

We get rid of parentheses

-v-1=0

We add all the numbers together, and all the variables

-1v-1=0

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

-v=1

v=1/-1

v=-1

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