-r-2-4r=-12

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Solution for -r-2-4r=-12 equation: 



-r-2-4r=-12

We move all terms to the left:

-r-2-4r-(-12)=0

We add all the numbers together, and all the variables

-5r+10=0

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

-5r=-10

r=-10/-5

r=+2

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