Question 1074056
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Your equation is

5r + 5*(r+3) = 225.

5r + 5r + 15 = 225  --->  10r = 210  --->  r = {{{210/10}}} = 21.


<U>Answer</U>. The speed of the slower cyclist is 21 mph. The speed of the faster syclist is 21+3 = 24 mph.
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