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9(r-85)=82
We move all terms to the left:
9(r-85)-(82)=0
We multiply parentheses
9r-765-82=0
We add all the numbers together, and all the variables
9r-847=0
We move all terms containing r to the left, all other terms to the right
9r=847
r=847/9
r=94+1/9
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