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-2(r-16)=2
We move all terms to the left:
-2(r-16)-(2)=0
We multiply parentheses
-2r+32-2=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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