求英语高手,懂的话可以帮我列个方程式吗A sum of money is just enough to buy 12 pears.If the price of each pear is reduced by $0.5,3 more pears can be bought with the same amount of money.How much is the sum of money

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求英语高手,懂的话可以帮我列个方程式吗A sum of money is just enough to buy 12 pears.If the price of each pear is reduced by $0.5,3 more pears can be bought with the same amount of money.How much is the sum of money
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求英语高手,懂的话可以帮我列个方程式吗A sum of money is just enough to buy 12 pears.If the price of each pear is reduced by $0.5,3 more pears can be bought with the same amount of money.How much is the sum of money
求英语高手,懂的话可以帮我列个方程式吗
A sum of money is just enough to buy 12 pears.If the price of each pear is reduced by $0.5,3 more pears can be bought with the same amount of money.How much is the sum of money

求英语高手,懂的话可以帮我列个方程式吗A sum of money is just enough to buy 12 pears.If the price of each pear is reduced by $0.5,3 more pears can be bought with the same amount of money.How much is the sum of money
小明有一笔钱,刚好可以买12个梨,如果每个梨的价格降低0.5美元,那么用同样多的钱可以多买3个梨,请问小明一共有多少钱?
设有X美元,每个梨的价格就是X/12
降低0.5美元,可以多买3个,所以（X/12-0.5）×（12+3）=X X=30美元

设梨最初的单价为x则，12x=（12+3）*（x-0.5）所以x=2.5 所以总共有12*2.5=30块钱。

一笔钱只够买12个梨。如果价格每年减少0.5元，3个梨可以买了相同数量的钱。有多少是一笔钱

有一笔钱能买12个梨，如果每个梨降0.5美元，则用同样多的钱能多买3个梨。求一共有多少钱。
设有x美元；
由题意知 (x/12-0.5)*x=15

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