-15r=-225

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Solution for -15r=-225 equation: 



-15r=-225

We move all terms to the left:

-15r-(-225)=0

We add all the numbers together, and all the variables

-15r+225=0

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

-15r=-225

r=-225/-15

r=+15

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