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Maria bicycles 4km/h faster than Javier. In the same time that it takes Javier to bike 60km, Maria bikes 72km. How fast does each bicyclist travel?

  • Algebra-km/h -

    60/j = 72/m

    60/j = 72/(j+4)
    60(j+4) = 72j
    60j + 240 = 72j
    240 = 12j
    20 = j
    24 = m

    They both bike for 3 hours to cover the indicated distances.

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