8v+7=9v-1

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Solution for 8v+7=9v-1 equation: 



8v+7=9v-1

We move all terms to the left:

8v+7-(9v-1)=0

We get rid of parentheses

8v-9v+1+7=0

We add all the numbers together, and all the variables

-1v+8=0

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

-v=-8

v=-8/-1

v=+8

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