请高手帮忙解一道英文数学题Two shops sell the same brand of chocolate at the same price . Today they both cut down its price. Shops A decreases the price by 30%, and increases by 30% after a week. Likewise, shop B decreases its price by 4

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请高手帮忙解一道英文数学题Two shops sell the same brand of chocolate at the same price . Today they both cut down its price. Shops A decreases the price by 30%, and increases by 30% after a week. Likewise, shop B decreases its price by 4
请高手帮忙解一道英文数学题
Two shops sell the same brand of chocolate at the same price . Today they both cut down its price. Shops A decreases the price by 30%, and increases by 30% after a week. Likewise, shop B decreases its price by 40%, and decreasesby 40% after a week. Are the prices of the chocolate at the two shops still the same after a week?

请高手帮忙解一道英文数学题Two shops sell the same brand of chocolate at the same price . Today they both cut down its price. Shops A decreases the price by 30%, and increases by 30% after a week. Likewise, shop B decreases its price by 4
不一样,假设开始时价格为P,对于商店A,一周之后为P×0.7×（1+0.3）,而对于商店B,一周之后为P×0.6×﹙1+0.4﹚

假如两个原价都为100元，那么A：100（1-30%）=70 70*（1+30%）=91
B：100*（1-40%）=60 60*（1+40%）=84 所以不相等

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