0=-3(r+6)

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Solution for 0=-3(r+6) equation: 



0=-3(r+6)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(-3(r+6)), so:

-3(r+6)

We multiply parentheses

-3r-18

Back to the equation:

-(-3r-18)



We get rid of parentheses

3r+18=0

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

3r=-18

r=-18/3

r=-6

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