Question 1037625
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Chad drove three times as fast Katy could Pedal. Chad drove 90 miles in 2 hours less than it took Katy to pedal 40 miles.
How fast could each of them travel? How long did they travel? 
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The equation is 


{{{90/3r}}} = {{{40/r -2}}}.


Solve by multiplying both sides by 2.


It is easy.