OG 350

[nature]

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

根據解答 這題題目應該有提出原price 乘上原towel數=120...但小妹我左看右看都看不出來哪邊有提到...只有得出(原price+1)(原towels-10)=120...
麻煩指點一下迷津

[吳志道]

If the currently price of each towel wee to be increased by $1, 10fewer of the towels could be brought for $120

price up 所以可以購買數量 down 都維持在120

假如有變化的話 數字會另外提出 ^^~