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?

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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