-2(r=9)=-28

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Solution for -2(r=9)=-28 equation: 



-2(r=9)=-28

We move all terms to the left:

-2(r-(9))=0

We multiply parentheses

-2r+18=0

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

-2r=-18

r=-18/-2

r=+9

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