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-2(6r+1)=-110
We move all terms to the left:
-2(6r+1)-(-110)=0
We add all the numbers together, and all the variables
-2(6r+1)+110=0
We multiply parentheses
-12r-2+110=0
We add all the numbers together, and all the variables
-12r+108=0
We move all terms containing r to the left, all other terms to the right
-12r=-108
r=-108/-12
r=+9
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