2(r-15)=-18

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Solution for 2(r-15)=-18 equation: 



2(r-15)=-18

We move all terms to the left:

2(r-15)-(-18)=0

We add all the numbers together, and all the variables

2(r-15)+18=0

We multiply parentheses

2r-30+18=0

We add all the numbers together, and all the variables

2r-12=0

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

2r=12

r=12/2

r=6

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