-9=-3(r-17)

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Solution for -9=-3(r-17) equation: 



-9=-3(r-17)

We move all terms to the left:

-9-(-3(r-17))=0



We calculate terms in parentheses: -(-3(r-17)), so:

-3(r-17)

We multiply parentheses

-3r+51

Back to the equation:

-(-3r+51)



We get rid of parentheses

3r-51-9=0

We add all the numbers together, and all the variables

3r-60=0

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

3r=60

r=60/3

r=20

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