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8r-19=2r+39
We move all terms to the left:
8r-19-(2r+39)=0
We get rid of parentheses
8r-2r-39-19=0
We add all the numbers together, and all the variables
6r-58=0
We move all terms containing r to the left, all other terms to the right
6r=58
r=58/6
r=9+2/3
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