è§£ï¼ è®¾å°æãå°è±çé®ç¥¨æ°åå«ä¸º xãy æï¼
ããæ ¹æ®é¢ç®æï¼ x = y + 80 ; åï¼ x + 10 = 4ï¼y - 10ï¼ ;
ããæï¼ ï¼y + 80ï¼+ 10 = 4y - 40 ;
ããæï¼ 4y - y = 80 + 10 + 40 ;
ããæï¼ 3y = 130 ;
ããæï¼ y = 130 / 3 = 43.33ï¼
ããæï¼ x = y + 80= 43.33 + 80 = 123.33 ã
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