-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-(+9r)-2+1=0

We add all the numbers together, and all the variables

-8r-(+9r)-1=0

We get rid of parentheses

-8r-9r-1=0

We add all the numbers together, and all the variables

-17r-1=0

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

-17r=1

r=1/-17

r=-1/17

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