-7=r+6r

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Solution for -7=r+6r equation: 



-7=r+6r

We move all terms to the left:

-7-(r+6r)=0

We add all the numbers together, and all the variables

-(+7r)-7=0

We get rid of parentheses

-7r-7=0

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

-7r=7

r=7/-7

r=-1

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