Question 1078273
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The solution by "josgarithmetic" is WRONG. 
Below find the correct solution.


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{{{r*3+(r+8)3=78}}}


{{{6r+24}}} = {{{78}}}


{{{3r+12}}} = {{{39}}}


{{{3r}}} = {{{27}}}


r = 9.


<U>Answer</U>.  9 mph for one cyclist and 9+8 = 17 mph for the other.
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