r-2r-18=15

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Solution for r-2r-18=15 equation: 



r-2r-18=15

We move all terms to the left:

r-2r-18-(15)=0

We add all the numbers together, and all the variables

-1r-33=0

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

-r=33

r=33/-1

r=-33

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