問題詳情
9. 若 x：y＝5：2，則下列敘述正確的有幾個？
(甲) 5x＝2y (乙) 
(丙) ( x＋y )：( x－y )＝7：3；5 2(丁) ( x－2 )：y＝3：2 (戊) xy：y＝5：1
(A) 2
(B) 3
(C) 4
(D) 5
參考答案
無參考答案
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