Solve the word problem using this 4-step model. (1) Tell what the variable

represents, (that is, x = ??); (2) write a rational equation that models the

problem; (3) solve the equation for the exact solution ; (4) write your

answer in words, labeling units as necessary.

Hank bicycles 5 km/hour slower than Kelly. In the time that it takes Hank to

bicycle 42 km, Kelly can bicycle 57 km. How fast does each bicyclist travel?