Problem solving of Don and ...

Don and Julie made a trip of 60 miles by bike. Julie traveled 5 miles per hour faster than Don as a result she arrived 1 hour before she did. how fast did each traveled? 請問要怎麼解?
我只能幫你解數學的部份

如果連說明都要用英文那我就沒輒了......唐(Don)和朱莉(Julie)都騎了60哩

朱莉的速度比唐每小時快5哩

朱莉比唐快了一小時到

問兩人騎的速度各是多少?以D代表Don的速度

J代表Julie的速度J=D 5距離/速度=時間(60/J) 1=(60/D)兩邊各乘以JD60D JD=60J再把J=D 5代入60D (D 5)D=60(D 5)兩邊刪除可得二元一次方程式D^2 5D-300=0(D 20)(D-15)=0D=15而J=20所以Julie的速度是每小時20哩Don的速度是每小時15哩
樓上那位大大沒辦法的英文我來幫忙(Don) and(Julie) rode 60 miles

Julie faster thanDon per hour at a speed of 5 miles

Julie an hour faster than theDon to

ask what is the speed of the two people riding?

problem-solving team,problem solving and program design in c,creative problem solving,problem solving learning,problem solving process,problem solving skills,limited problem solving,extended problem solving,problem solving model,problem-solving styleProblem solving,Julie,朱莉,miles per hour faster,as a result,朱莉比,速度,二元一次方程式,JD,小時

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