-2(r-9)=-24

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Solution for -2(r-9)=-24 equation: 



-2(r-9)=-24

We move all terms to the left:

-2(r-9)-(-24)=0

We add all the numbers together, and all the variables

-2(r-9)+24=0

We multiply parentheses

-2r+18+24=0

We add all the numbers together, and all the variables

-2r+42=0

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

-2r=-42

r=-42/-2

r=+21

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