2(r-6)=18

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Solution for 2(r-6)=18 equation: 



2(r-6)=18

We move all terms to the left:

2(r-6)-(18)=0

We multiply parentheses

2r-12-18=0

We add all the numbers together, and all the variables

2r-30=0

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

2r=30

r=30/2

r=15

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