Solve for r
r = \frac{31}{8} = 3\frac{7}{8} = 3.875
Assign r
r≔\frac{31}{8}
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r=\frac{24+7}{8}
Multiply 3 and 8 to get 24.
r=\frac{31}{8}
Add 24 and 7 to get 31.
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