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¥Ñ VanHK ©ó ¬P´Á¤G ¤»¤ë 25, 2013 9:52 pm


¤p±öªº¿ú½cùئ³¤Q¤¸¡B¤­¤¸¡B¤G¤¸µw¹ô¦@48­Ó¡A

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VanHK
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¥Ñ Tzwan ©ó ¬P´Á¤T ¤»¤ë 26, 2013 10:46 am


¥O¿ú½c¸Ì¦³x­Ó¤Q¤¸, y­Ó¤­¤¸, z­Ó¤G¤¸µw¹ô.

«h¥i±o¤T¤¸¤@¦¸Áp¥ß¤èµ{¦¡:
    x + y + z = 48 ----(1)
    z = 2y - 7 ----(2)
    10x + 5y + 2z = 200 ----(3)

¸Ñ¦¹Áp¥ß¤èµ{:
    (3)-10*(1)
  =>-5y - 8z = -280 ----(4)
    (4)+8*(2)
  =>-21y = -336
  =>y = 16 ¥N¤J(2)
  =>z = 25 ¥N¤J(1)
  =>x = 7

7­Ó¤Q¤¸, 16­Ó¤­¤¸, 25­Ó¨â¤¸

Tzwan
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¤å³¹: 33
µù¥U®É¶¡: 2013-04-01




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