12r=3r+18

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Solution for 12r=3r+18 equation: 



12r=3r+18

We move all terms to the left:

12r-(3r+18)=0

We get rid of parentheses

12r-3r-18=0

We add all the numbers together, and all the variables

9r-18=0

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

9r=18

r=18/9

r=2

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