OG12, Problem solving sample questions, 195, solution?请大牛指点！多谢

a store currently charges 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?

对划线句子的理解是解题的关键，og有解答，但是有些看不懂！

请各位大牛不吝赐教！谢谢！

答案是3吧

题意是商店卖的每条毛巾的价钱是相同的，如果把现价+1，那么用120块钱就会少买到10条，问原价

设原价是p，

价钱是p时，120元能买到的毛巾数为n

则有p*n=120

(p+1)(n-10)=120

解得p=3，n=40

故原价是3 每条

多谢仁兄！