一件衣服,打九折后便宜了45元,这件衣服原价______元.
人气:190 ℃ 时间:2019-08-19 19:36:46
解答
设这件衣服原价为x元,
x-0.9x=45
x=450
这件衣服原价450元.
故答案为:450.
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