99=-3(-5r-3)

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Solution for 99=-3(-5r-3) equation: 



99=-3(-5r-3)

We move all terms to the left:

99-(-3(-5r-3))=0



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

-3(-5r-3)

We multiply parentheses

15r+9

Back to the equation:

-(15r+9)



We get rid of parentheses

-15r-9+99=0

We add all the numbers together, and all the variables

-15r+90=0

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

-15r=-90

r=-90/-15

r=+6

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