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設這三個數分別為x,y,z根據題意列方程得x:y:z=3:4:5 z-x=16 --> x/z=3/5 z-x=16 --> x=3/5z z-x=16 --> z-3/5z=16 --> 2/5z=16 -->z=40 -->x=24 y=32 甲數為24,乙數32,丙數40
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