(-3r)-36=(-15)

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Solution for (-3r)-36=(-15) equation: 



(-3r)-36=(-15)

We move all terms to the left:

(-3r)-36-((-15))=0

We add all the numbers together, and all the variables

(-3r)-21=0

We get rid of parentheses

-3r-21=0

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

-3r=21

r=21/-3

r=-7

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