-15=-3r-2r

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Solution for -15=-3r-2r equation: 



-15=-3r-2r

We move all terms to the left:

-15-(-3r-2r)=0

We add all the numbers together, and all the variables

-(-5r)-15=0

We get rid of parentheses

5r-15=0

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

5r=15

r=15/5

r=3

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