-1-8r=-8-7r

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



-1-8r=-8-7r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-8r+7r+8-1=0

We add all the numbers together, and all the variables

-1r+7=0

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

-r=-7

r=-7/-1

r=+7

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