194.

A certain state levies a 4 percent tax on the nightly rates of hotel rooms.  A certain hotel in this state also charges a $2.00 nightly fee per room, which is not subject to tax.  If the total charge for a room for one night was $74.80, what was the nightly rate of the room?

(A) $68.00

(B) $69.00

(C) $70.00

(D) $71.00

(E) $72.00

C

题目啥意思呢？

题目的意思是这样的：政府对宾馆的收入征税，按照每晚每间房收费的4%征收，但是宾馆的收费（每晚每间房）中有$2是不用征税的，现在每晚每间房的总收费为$74.8，问宾馆对每晚每间房的收费额为多少？

实际上$74.8是包括宾馆收费和政府收税的总和，求解的金额是宾馆收取的净额。

which is not subject to tax，你翻译成但是宾馆的收费（每晚每间房）中有$2是不用征税的

那不是变成(x-2)(1+4%)=74.8了么？

应该是:宾馆收费有4%纳税，还有2元什么费用(就这句话拗口，不明白，不知道说什么费用)

x（1＋4％）＋2＝74.8

我又看了一下，是这样的，$74.8里面包含了tax, nightly rate和nightly fee三项，其中tax=4%*nightly rate, nightly fee=$2，求解nightly rate。

我把nightly rate和nightly fee这两个概念弄混了。