请教下PREP DS的题

黑夜

Each person attending a fund-raising party for a certain club was charged the same admission fee.  How many people attended the party?

 

(1) If the admission fee had been $0.75 less and 100 more people had attended, the club would have received the same amount in admission fees.

 

(2) If the admission fee had been $1.50 more and 100 fewer people had attended, the club would have received the same amount in admission fees.

请教下这题。。感觉题目都没读明白啊。。晕

tianyunUCB

C ?

baobaodezhu

同文题意，NN路过来看一下啊

marianbaobao

列个方程组

设原admission fee为X，参加人数Y人

(X-0.75)(Y+100)=XY

(X+1.5)(Y-100)=XY

展开后XY削掉，就可以解出X和Y