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12. 有甲、乙兩個大小不同的水桶,容量分別為 x、y 公升,且已各裝一些水。若將甲中的水全倒入乙後,乙只可再裝 20 公升的水;若將乙中的水倒入甲,裝滿甲水桶後,乙還剩 10 公升的水,則 x、y
問題詳情
12. 有甲、乙兩個大小不同的水桶,容量分別為 x、y 公升,且已各裝一些水。若將甲中的水全倒入乙後,乙只可再裝 20 公升的水;若將乙中的水倒入甲,裝滿甲水桶後,乙還剩 10 公升的水,則 x、y 的關係為何?
(A) y=20-x
(B) y=x+10
(C) y=x+20
(D) y=x+30
參考答案
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【題組】21. (A) get to the door(B) check the e-mail(C) turn off the light(D) answer the phone
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11. 某鞋店有甲、乙兩款鞋各 30 雙,甲鞋一雙 200 元,乙鞋一雙 50 元。該店促銷的方式:買一雙甲鞋,送一雙乙鞋;只買乙鞋沒有任何優惠。若打烊後得知,此兩款鞋共賣得 1800元,還剩甲鞋 x
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