问一道数学题(实际上英文题干没有看懂)

圣荷塞UID: 25548

A store currently changes the same price for each towel that it sells. If the current price of each towel were to be increased by $1, 10 fewer of the towels could be bought for $120, excluding sales tax.
What is the current price of each towel?

看这道题怎么看都只能推出以下方程呀!
设N为price, M为数量, 则(N+1)*(M-10)=120, 但这个方程无法解出答案呀!

但是解答说明中的MN=120是怎么从题干里看出来的?

thewind_bellUID: 111681

10 fewer of the towels could be bought for $120
这句话的意思是：涨价后，用120元所买的towel数量比原来少了10条.....（fewer是一个比较级..明显只能和原来比较）

OK！就可以得出MN=120

好象是白皮书上的一道题............

圣荷塞UID: 25548

Thanks!偶明白了，可是换成英文的时候怎么都没转过那道弯来。。。