8r=r-12+r

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Solution for 8r=r-12+r equation: 



8r=r-12+r

We move all terms to the left:

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

We add all the numbers together, and all the variables

8r-(2r-12)=0

We get rid of parentheses

8r-2r+12=0

We add all the numbers together, and all the variables

6r+12=0

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

6r=-12

r=-12/6

r=-2

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