-12-2r=r+3

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Solution for -12-2r=r+3 equation: 



-12-2r=r+3

We move all terms to the left:

-12-2r-(r+3)=0

We get rid of parentheses

-2r-r-3-12=0

We add all the numbers together, and all the variables

-3r-15=0

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

-3r=15

r=15/-3

r=-5

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