-31=-3(r+5)

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Solution for -31=-3(r+5) equation: 



-31=-3(r+5)

We move all terms to the left:

-31-(-3(r+5))=0



We calculate terms in parentheses: -(-3(r+5)), so:

-3(r+5)

We multiply parentheses

-3r-15

Back to the equation:

-(-3r-15)



We get rid of parentheses

3r+15-31=0

We add all the numbers together, and all the variables

3r-16=0

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

3r=16

r=16/3

r=5+1/3

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