2(5r - 9) + 3r = 60
10r - 18 + 3r = 60
13r = 60 + 18
13r = 78
r = 6
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2(5r - 9) + 3r = 60
10r - 18 + 3r = 60
13r = 60 + 18
13r = 78
r = 6