甲乙丙三个数的和140,甲等于乙的2倍,乙等于丙的2倍,甲乙丙三个数相乘积是多少
人气：213 ℃ 时间：2019-10-19 20:45:07
解答
设乙为x,甲为2x,丙为1/2x.
x+2x+1/2x＝140
x=40
∴甲=80
丙=20
乙=40
∴乘积=80×20×40＝64000
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