-2+1-r-7r=-8r+r

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Solution for -2+1-r-7r=-8r+r equation: 



-2+1-r-7r=-8r+r

We move all terms to the left:

-2+1-r-7r-(-8r+r)=0

We add all the numbers together, and all the variables

-r-7r-(-7r)-2+1=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-8r+7r-1=0

We add all the numbers together, and all the variables

-1r-1=0

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

-r=1

r=1/-1

r=-1

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