7=-8+v

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Solution for 7=-8+v equation: 



7=-8+v

We move all terms to the left:

7-(-8+v)=0

We add all the numbers together, and all the variables

-(v-8)+7=0

We get rid of parentheses

-v+8+7=0

We add all the numbers together, and all the variables

-1v+15=0

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

-v=-15

v=-15/-1

v=+15

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