Question 976007
r, for jogger.
r+18, the rate of the bicyclist.


Look at the distances!  bicyclist goes three times faster than the jogger.
{{{r+18=3r}}}, solve.



If that seems not so easy to decide and to form, then make a data table and use RT=D to analyze and find what and how to solve.




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r=9 miles per hour, the jogger.