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3(3r-19)=2r-22
We move all terms to the left:
3(3r-19)-(2r-22)=0
We multiply parentheses
9r-(2r-22)-57=0
We get rid of parentheses
9r-2r+22-57=0
We add all the numbers together, and all the variables
7r-35=0
We move all terms containing r to the left, all other terms to the right
7r=35
r=35/7
r=5
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