Math
Math, 20.08.2019 00:00, malikfaiz24

Dariella walks x km at 5km/h and then runs (x+4) km at 10 km/h. the average speed of the journey is 7 km/h. find the value of x

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Dariella walks x km at 5km/h and then runs (x+4) km at 10 km/h. the average speed of the journey is...

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