9=r+3-3r

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



9=r+3-3r

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-2r+3)+9=0

We get rid of parentheses

2r-3+9=0

We add all the numbers together, and all the variables

2r+6=0

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

2r=-6

r=-6/2

r=-3

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