求一道数学题的翻译与解答

来源：百度知道 编辑：UC知道 时间：2024/05/14 02:56:25
Alice's take-home pay last year was the same each month,and she saved the same fraction of her take-home pay each month.The total amount of money that she had saved at he end of the year was 3times the amont of that portion of her monthly take-home pay that she did not save.If all the money that she saved last year was from her take-home pay,what fraction of her take-home pay did she save each month?
A.1/2
B.1/3
C.1/4
D.1/5

正确答案是D
答案不是C

我觉得是文字的意思上有陷阱，但翻译不出来

设每个月take-home pay为a,每个月节约的钱占每个月总的x,
12*a*x=3*a*(1-x)
x=1/5

应该是C吧

D

Alice去年一年中每个月的拿家报酬都是一样的,她每月都存起同样多的一部分. 年终,她所储存的钱数是她每月没有储存的钱的三倍.如果去年她所有储存的钱都是从她的拿家报酬中的所得,她每个月储存她拿家报酬的几分之几?