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mx/2-5/3=(x-4/3)/2 mx/2-5/3=(3x-4)/6 3mx-10=3x-4 (3m-3)x=6 (m-1)x=2 因為m=1時,0x=2,x無解,不合題意 所以m≠1 所以x=2/(m-1) 因為解x是正整數,m為整數 所以m-1應為2的約數1,或2 所以m=2,或3
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