Solve for r
r = \frac{188}{13} = 14\frac{6}{13} \approx 14.461538462
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13r-54=134
Combine r and 12r to get 13r.
13r=134+54
Add 54 to both sides.
13r=188
Add 134 and 54 to get 188.
r=\frac{188}{13}
Divide both sides by 13.
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