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假設a組x,b組y.c組z 1/5 x=1/4 y+ 1/2 z(1) x+y+z=54(2) (1)乘以5帶入2 5/4y+7/2z=54 y z都為偶數而且y為4的倍數x為5 的倍數 試一下得到 無解你問錯了吧
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