-3r-9=15

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Solution for -3r-9=15 equation: 



-3r-9=15

We move all terms to the left:

-3r-9-(15)=0

We add all the numbers together, and all the variables

-3r-24=0

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

-3r=24

r=24/-3

r=-8

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