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2(1-6r)=-82
We move all terms to the left:
2(1-6r)-(-82)=0
We add all the numbers together, and all the variables
2(-6r+1)-(-82)=0
We add all the numbers together, and all the variables
2(-6r+1)+82=0
We multiply parentheses
-12r+2+82=0
We add all the numbers together, and all the variables
-12r+84=0
We move all terms containing r to the left, all other terms to the right
-12r=-84
r=-84/-12
r=+7
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