中夏化工总厂有两堆煤,共重2268千克,取出甲堆的2/5和乙堆的1/4共重708千克.问原有煤各是多少千克?
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![中夏化工总厂有两堆煤,共重2268千克,取出甲堆的2/5和乙堆的1/4共重708千克.问原有煤各是多少千克?](/uploads/image/z/7841692-28-2.jpg?t=%E4%B8%AD%E5%A4%8F%E5%8C%96%E5%B7%A5%E6%80%BB%E5%8E%82%E6%9C%89%E4%B8%A4%E5%A0%86%E7%85%A4%2C%E5%85%B1%E9%87%8D2268%E5%8D%83%E5%85%8B%2C%E5%8F%96%E5%87%BA%E7%94%B2%E5%A0%86%E7%9A%842%2F5%E5%92%8C%E4%B9%99%E5%A0%86%E7%9A%841%2F4%E5%85%B1%E9%87%8D708%E5%8D%83%E5%85%8B.%E9%97%AE%E5%8E%9F%E6%9C%89%E7%85%A4%E5%90%84%E6%98%AF%E5%A4%9A%E5%B0%91%E5%8D%83%E5%85%8B%3F)
中夏化工总厂有两堆煤,共重2268千克,取出甲堆的2/5和乙堆的1/4共重708千克.问原有煤各是多少千克?
中夏化工总厂有两堆煤,共重2268千克,取出甲堆的2/5和乙堆的1/4共重708千克.问原有煤各是多少千克?
中夏化工总厂有两堆煤,共重2268千克,取出甲堆的2/5和乙堆的1/4共重708千克.问原有煤各是多少千克?
设甲堆X千克,乙2268-X千克
2X/5+(2268-X)/4=708
0.4X+567-0.25X=708
0.15X=141
X=141/0.15
X=940
甲堆940千克,乙堆1328千克
甲堆的1/4和乙堆的1/4共重2268×1/4=567(千克)
原来甲堆有煤
=(708-567)÷(2/5-1/4)
=141÷(3/20)
=940(千克)
原来乙堆有煤
=2268-940
=1328(千克)
2。500 0。不i可能,本来占3。4,又a买了a怎么l可能变成0。22 5。200 8。40 6。30 4。27 6。20 4。38和00 5。1400和8000 20。71和4 35。430和5254 65。80和00 82。630和600
2011-10-25 23:09:37
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