3(r-9)=18

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Solution for 3(r-9)=18 equation: 



3(r-9)=18

We move all terms to the left:

3(r-9)-(18)=0

We multiply parentheses

3r-27-18=0

We add all the numbers together, and all the variables

3r-45=0

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

3r=45

r=45/3

r=15

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