12+6r=r+7r

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Solution for 12+6r=r+7r equation: 



12+6r=r+7r

We move all terms to the left:

12+6r-(r+7r)=0

We add all the numbers together, and all the variables

6r-(+8r)+12=0

We get rid of parentheses

6r-8r+12=0

We add all the numbers together, and all the variables

-2r+12=0

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

-2r=-12

r=-12/-2

r=+6

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