甲乙丙的平均数是28甲乙丙.甲、乙、丙的平均数是28,甲、乙、丙的比是3:2:1,乙数是多少?(把算式、得数列清楚,在后面讲解)
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![甲乙丙的平均数是28甲乙丙.甲、乙、丙的平均数是28,甲、乙、丙的比是3:2:1,乙数是多少?(把算式、得数列清楚,在后面讲解)](/uploads/image/z/2448934-70-4.jpg?t=%E7%94%B2%E4%B9%99%E4%B8%99%E7%9A%84%E5%B9%B3%E5%9D%87%E6%95%B0%E6%98%AF28%E7%94%B2%E4%B9%99%E4%B8%99.%E7%94%B2%E3%80%81%E4%B9%99%E3%80%81%E4%B8%99%E7%9A%84%E5%B9%B3%E5%9D%87%E6%95%B0%E6%98%AF28%2C%E7%94%B2%E3%80%81%E4%B9%99%E3%80%81%E4%B8%99%E7%9A%84%E6%AF%94%E6%98%AF3%EF%BC%9A2%EF%BC%9A1%2C%E4%B9%99%E6%95%B0%E6%98%AF%E5%A4%9A%E5%B0%91%3F%EF%BC%88%E6%8A%8A%E7%AE%97%E5%BC%8F%E3%80%81%E5%BE%97%E6%95%B0%E5%88%97%E6%B8%85%E6%A5%9A%2C%E5%9C%A8%E5%90%8E%E9%9D%A2%E8%AE%B2%E8%A7%A3%EF%BC%89)
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