-3(6r+3)=-99

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Solution for -3(6r+3)=-99 equation: 



-3(6r+3)=-99

We move all terms to the left:

-3(6r+3)-(-99)=0

We add all the numbers together, and all the variables

-3(6r+3)+99=0

We multiply parentheses

-18r-9+99=0

We add all the numbers together, and all the variables

-18r+90=0

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

-18r=-90

r=-90/-18

r=+5

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