9=3r-45

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Solution for 9=3r-45 equation: 



9=3r-45

We move all terms to the left:

9-(3r-45)=0

We get rid of parentheses

-3r+45+9=0

We add all the numbers together, and all the variables

-3r+54=0

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

-3r=-54

r=-54/-3

r=+18

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