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2012-11-29 pm 4:52:00 50.--.73.34 |
| two digit number 10a+b µÚÁýÀ¸¸é 10b+a ±×·¯´Ï±î 10a+b = 5(a+b) 10b+a=10a+b+9 a=4 b=5
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![](image/icon/icon_arrow.gif) | 2012-11-29 pm 4:55:00 173.--.102.94 |
| ¿ä±â±îÁö´Â ¾Æ´Âµ¥ ±× ´ÙÀ½À» ¸ð¸£°Úµ¥¿ä
¾Æ¸¶ ´ëÀÔÀ» ¸ø½ÃÅ°´Â°Å °°¾Æ¿ä Á»´õ ÀÚ¼¼È÷Á» ºÎŹµå¸±²²¿ä Á˼ÛÇØ¿ä |
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![](image/icon/icon_arrow.gif) | 2012-11-29 pm 4:55:00 50.--.73.34 |
| digitÀº ¼ýÀÚÀÌ°í¿ä...ÀÚ¸´¼ö´Ï±î ½ÊÀÚ¸®´Â 10 ¹éÀÚ¸®´Â 100À» °öÇؾßÁÒ. ±×·¯´Ï µÎÀÚ¸® ¼ýÀÚ´Â 10a+b°¡ µË´Ï´Ù. 45¶ó¸é a=4 b=5 ÀÔ´Ï´Ù. |
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![](image/icon/icon_arrow.gif) | 2012-11-29 pm 4:59:00 50.--.73.34 |
| 10a+b=5a+5b 10b+a=10a+b+9 ¸¦ ¿¬¸³¹æÁ¤½ÄÀ¸·Î Ǫ¼¼¿ä.
aÇ×Àº ¿ÞÂÊ bÇ×Àº ¿À¸¥ÂÊÀ¸·Î À̵¿
10a-5a=5b-b a-10a=b-10b+9
±×·±´ÙÀ½ Á¤¸® 5a-4b=0 -9a+9b=9
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![](image/icon/icon_arrow.gif) | 2012-11-29 pm 5:02:00 50.--.73.34 |
| ÀÌ¾î¼ a³ª b Çϳª¸¦ ¾ø¾Ö¼¼¿ä.
5a-4b=0 -a+b=1
5a-4b=0 -4a+4b=4 (¾çÂÊ¿¡ °öÇϱâ 4...b¸¦ ¾ø¾Ù·Á°í)
ÀÌ µÎ ½ÄÀ» ¾Æ·¡ À§ ´õÇϼ¼¿ä ±×·¯¸é -4b+4b=0 Çؼ b´Â ¾ø¾îÁö°í a¸¸ ³²ÁÒ. ±×·¯¸é a=4 ÀÌ°É -a+b=1 ¿¡ ´ëÀÔÇϸé b=5 |
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![](image/icon/icon_arrow.gif) | 2012-11-29 pm 5:04:00 173.--.102.94 |
| 50´Ô ³Ê¹« °¨»çµå·Á¿ä µþÀÌ °í¹Ù·Î´ÙÀ½ a¿Í b¸¦ ¸ø±¸ÇÏ°Ú´Ù°í Çϳ׿ä
ÀÌ°Å ±âÃʺÎÁ· ¸ÂÁÒ
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| * º»ÀÎÀÌ »èÁ¦Ç߰ųª °ü¸®ÀÚ¿¡ ÀÇÇØ »èÁ¦µÈ ±ÛÀÔ´Ï´Ù. |
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2012-11-29 pm 5:05:00 50.--.73.34 |
| ´ä±Û ´Þ¾Ò´Âµ¥ Ȥ ÀÌÇØ°¡ ¾ÈµÇ´Â ºÎºÐ ÀÖÀ¸¸é ¾Ë·ÁÁÖ¼¼¿ä... |
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2012-11-29 pm 5:08:00 50.--.73.34 |
| ¾Æ´Ô ÂÊÁö ÁÖ¼¼¿ä^^ .............sil8226 |
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![](image/icon/icon_arrow.gif) | 2012-11-29 pm 5:15:00 173.--.102.94 |
| ¾Æ°í°í °¨»çµå·Á¿ä µþÀÌ Áö±Ý Ç®°í ÀÖ´Â ÁßÀÌ¿¡¿ä ¾Ë·ÁÁÖ½Å°Ç Ç®¾ú´Ù°í ÇÏ³×¿ä ±Ùµ¥ ºñ½ÁÇÑ À¯ÇüÀÌ 10°³ÀÖ¾î¼ Ç®¾îº»´Ù°í Çϴµ¥... ´Ù½ÃÇѹø °¨»çµå·Á¿ä Ȥ½Ã ¸ð¸£´Â°Å ÀÖÀ¸¸é Á˼ÛÇѵ¥ ÂÊÁö µå·Áµµ µÉ±î¿ä
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