-3(9-r)=9

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



-3(9-r)=9

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3(-1r+9)-9=0

We multiply parentheses

3r-27-9=0

We add all the numbers together, and all the variables

3r-36=0

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

3r=36

r=36/3

r=12

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