The price of the class A computer is reduced by 20% to $2000. After a 25% increase in the price of the class B computer, the price will be $2000. What is the sum of the original prices of class A and class B computers?
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A$3500
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B$3700
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C$3900
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D$4100
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E$4300
显示答案
正确答案: D