r-15=13r=

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Solution for r-15=13r= equation: 



r-15=13r=

We move all terms to the left:

r-15-(13r)=0

We add all the numbers together, and all the variables

-12r-15=0

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

-12r=15

r=15/-12

r=-1+1/4

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