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標題:

Pls Help!!

發問:

梨子+蘋果+香蕉 共 630 梨子+橙+香蕉 共 730 蘋果+橙+香蕉 共 330 蘋果+橙+梨子共 830 請問梨子,蘋果, 香蕉, 橙 各有幾多個?? Thanks!!!

最佳解答:

[1] a + b + c = 630 [2] a + d + c = 730 [3] b + d + c = 330 [4] b + d + a = 830 [1]+[2]+[3]+[4]: 3a + 3b + 3c + 3d = 630 + 730 + 330 + 830 3(a + b + c + d) = 2520 a + b + c + d = 840 ... [5] [5] - [3]: a = 510 [5] - [2]: b = 110 [5] - [4]: c = 10 [5] - [1]: d = 210 梨子數 = 510 蘋果數 = 110 香蕉數 = 10 橙數 = 210 2013-10-24 14:09:30 補充： Ada, you are welcome~ But in this way, you disclosed your nickname and you wasted 10 points for asking in an anonymous way. Anyway, take care~ ^__^

其他解答:

梨子:a 蘋果:b 香蕉:c 橙:d [1] a + b + c = 630 [2] a + c + d = 730 [3] b + c + d = 330 [4] a + b + d = 830 [1]+[2]+[3]+[4]: 3a + 3b + 3c + 3d = 630 + 730 + 330 + 830 3(a + b + c + d) = 2520 a + b + c + d = 840 ... [5] [5] - [3]: a = 510 [5] - [2]: b = 110 [5] - [4]: c = 10 [5] - [1]: d = 210 梨子 = 510個 蘋果 = 110個 香蕉 = 10個 橙 = 210個|||||Masterijk , Thank you for your help !!!C8D74AB62542840B