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  MarshallhadtwiceasmanymarblesaeEsther.whenEsthergavehim12ofhermarbles,hethenhai120moremarblesthanher.howmanymarblesdidEstherhaveatfirst

  MarshallhadtwiceasmanymarblesaeEsther.whenEsthergavehim12ofhermarbles,hethenhai120moremarblesthanher.howmanymarblesdidEstherhaveatfirst

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2020-06-2123:01
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曲昕

  原题是:已知Marshall的弹珠是Esther的两倍,若Esther给Marshall12个弹珠,则Marshall比Esther多120个弹珠,求刚开始的时候Esther有几个弹珠呢?设Esther有x个,则Marshall有2x个,由题知,X-12=2X+12-120解得x=96所...

2020-06-21 23:03:34
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