问题
填空题
某种电器产品，每件若以原定价的9折销售，可获利150元，若以原定价的7折销售，则亏损50元，该种商品每件的进价为___ ______元.
答案
750
题目分析：
解：设进价是X，原定价是Y
则有：
0.9Y-X=150
0.7Y-X=50
故X=750
点评：列方程式解答本题是关键，考生要学会设未知数进而列出合理的方程式，进而求解
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某种电器产品，每件若以原定价的9折销售，可获利150元，若以原定价的7折销售，则亏损50元，该种商品每件的进价为___ ______元.
750
题目分析：
解：设进价是X，原定价是Y
则有：
0.9Y-X=150
0.7Y-X=50
故X=750
点评：列方程式解答本题是关键，考生要学会设未知数进而列出合理的方程式，进而求解
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| Here are my favorite photos 1 the first one, you can find it's 2 . I'm wearing a T-shirt and sitting on the grass. The 3 one is a photo of my family. I'm 4 computer games. My grandfather is playing the erhu. My father is 5 a newspaper. My grandmother is talking about the TV show 6 my sister. And my mother is 7 the table. I love this photo very much. In the third one, there are two 8 .They are my friends, Tim and his brother. They are playing basketball. In the last one, I'm singing and my friends are dancing. 9 I see these photos, I'm very happy. They make me think of the happy 10 . I will keep the photos all my life. | ||||
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