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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
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
參考答案
答案:D
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每本X元的作業簿,共買X+3本所花費金額★☆(...
上一篇 :
9.下列方程式中,何者的解是無解?(A) 9x2-6x+1=0 (B) 2x2-2x+4=0(C) x2+4x-4=0 (D) x2-9=0 。
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