2=3r+9

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Solution for 2=3r+9 equation: 



2=3r+9

We move all terms to the left:

2-(3r+9)=0

We get rid of parentheses

-3r-9+2=0

We add all the numbers together, and all the variables

-3r-7=0

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

-3r=7

r=7/-3

r=-2+1/3

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