2r=8r-9

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Solution for 2r=8r-9 equation: 



2r=8r-9

We move all terms to the left:

2r-(8r-9)=0

We get rid of parentheses

2r-8r+9=0

We add all the numbers together, and all the variables

-6r+9=0

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

-6r=-9

r=-9/-6

r=1+1/2

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