-2(r-9)=4

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Solution for -2(r-9)=4 equation: 



-2(r-9)=4

We move all terms to the left:

-2(r-9)-(4)=0

We multiply parentheses

-2r+18-4=0

We add all the numbers together, and all the variables

-2r+14=0

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

-2r=-14

r=-14/-2

r=+7

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