-r-20=-12

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Solution for -r-20=-12 equation: 



-r-20=-12

We move all terms to the left:

-r-20-(-12)=0

We add all the numbers together, and all the variables

-1r-8=0

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

-r=8

r=8/-1

r=-8

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