3r-9=18-6r

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Solution for 3r-9=18-6r equation: 



3r-9=18-6r

We move all terms to the left:

3r-9-(18-6r)=0

We add all the numbers together, and all the variables

3r-(-6r+18)-9=0

We get rid of parentheses

3r+6r-18-9=0

We add all the numbers together, and all the variables

9r-27=0

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

9r=27

r=27/9

r=3

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