問題詳情
10.阿信帶500元去買每本x元的作業簿，買(x＋3)本，並找回40元。依題意可列出下列哪一個方程式？
(A)x(x－3)＝500－40
(B)x(x－3)＝500＋40
(C)x(x＋3)＝500＋40
(D)x(x＋3)＝500－40
(A)x(x－3)＝500－40
(B)x(x－3)＝500＋40
(C)x(x＋3)＝500＋40
(D)x(x＋3)＝500－40
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增
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