13r+15=-2r

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Solution for 13r+15=-2r equation: 



13r+15=-2r

We move all terms to the left:

13r+15-(-2r)=0

We get rid of parentheses

13r+2r+15=0

We add all the numbers together, and all the variables

15r+15=0

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

15r=-15

r=-15/15

r=-1

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