-15=3r-6r

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Solution for -15=3r-6r equation: 



-15=3r-6r

We move all terms to the left:

-15-(3r-6r)=0

We add all the numbers together, and all the variables

-(-3r)-15=0

We get rid of parentheses

3r-15=0

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

3r=15

r=15/3

r=5

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