7=v-1-2v

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Solution for 7=v-1-2v equation: 



7=v-1-2v

We move all terms to the left:

7-(v-1-2v)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

1v+1+7=0

We add all the numbers together, and all the variables

v+8=0

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

v=-8

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