-8r=-9+r

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Solution for -8r=-9+r equation: 



-8r=-9+r

We move all terms to the left:

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

We add all the numbers together, and all the variables

-8r-(r-9)=0

We get rid of parentheses

-8r-r+9=0

We add all the numbers together, and all the variables

-9r+9=0

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

-9r=-9

r=-9/-9

r=1

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