9.A jewelry dealer initially offered a bracelet for sale at an asking price that would give a profit to the dealer of 40 percent of the original cost. What was the original cost of the bracelet?
(1)After reducing this asking price by 10 percent, the jewelry dealer sold the bracelet at a profit of $403
(2)The jewelry dealer sold the bracelet for $1,953
Ans:A
我選D,設original cost=X
第一個條件OK:1.4X*0.9-X=403,可解出X
第二個條件: 1.4X=1953,可解出X…所以也OK不是嗎???
唯一可以想到的大概是題目有一個“initially”∴代表最後賣出的價格非1.4X,也就是第二個條件裡,$1953並不等於1.4X,是這樣嗎??請教各位一下~~3Q