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OpenStudy (anonymous):
Elena bicycles 4 km/h faster than Robert. In the same time it takes Robert to bicycle 48 km, Elena can bicycle 60 km. How fast does each bicyclist travel? Robert travels ? km/h. Elena travels ? km/h.
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OpenStudy (anonymous):
let x be elena's speed and y robert's x=y+4 48/y=60/x==>y=(4/5)*x ==>x=(4/5)*x+4===>x/5=4==>x=20 y=16
OpenStudy (anonymous):
THX
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