8r-3r-9=3r+9

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Solution for 8r-3r-9=3r+9 equation: 



8r-3r-9=3r+9

We move all terms to the left:

8r-3r-9-(3r+9)=0

We add all the numbers together, and all the variables

5r-(3r+9)-9=0

We get rid of parentheses

5r-3r-9-9=0

We add all the numbers together, and all the variables

2r-18=0

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

2r=18

r=18/2

r=9

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