有关初中非负数的数学题已知三个非负数a,b,c满足3a+2b+c=5,2a+b-3c=1,若m=3a+b-7c,求m的最大值和最小值
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![有关初中非负数的数学题已知三个非负数a,b,c满足3a+2b+c=5,2a+b-3c=1,若m=3a+b-7c,求m的最大值和最小值](/uploads/image/z/8630250-42-0.jpg?t=%E6%9C%89%E5%85%B3%E5%88%9D%E4%B8%AD%E9%9D%9E%E8%B4%9F%E6%95%B0%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%E5%B7%B2%E7%9F%A5%E4%B8%89%E4%B8%AA%E9%9D%9E%E8%B4%9F%E6%95%B0a%2Cb%2Cc%E6%BB%A1%E8%B6%B33a%2B2b%2Bc%3D5%2C2a%2Bb-3c%3D1%2C%E8%8B%A5m%3D3a%2Bb-7c%2C%E6%B1%82m%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E5%92%8C%E6%9C%80%E5%B0%8F%E5%80%BC)
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