9r+15-10=-13

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Solution for 9r+15-10=-13 equation: 



9r+15-10=-13

We move all terms to the left:

9r+15-10-(-13)=0

We add all the numbers together, and all the variables

9r+18=0

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

9r=-18

r=-18/9

r=-2

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