12+6r=2r-16

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Solution for 12+6r=2r-16 equation: 



12+6r=2r-16

We move all terms to the left:

12+6r-(2r-16)=0

We get rid of parentheses

6r-2r+16+12=0

We add all the numbers together, and all the variables

4r+28=0

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

4r=-28

r=-28/4

r=-7

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