In a computer game, Edward gets 1300 points less than two times William's score. If they get a total score of 6500 points, who has got a higher score ? By how many points?
2006-10-28 12:55:34 · 2 個解答 · 發問者 喵喵 2 in 科學 ➔ 數學
In a computer game, Edward gets 1300 points less than two times William,s score. If they get a total score of 6500 points, who has got a higher score ? By how many points?
2006-10-28 13:01:17 · update #1
假設Edward有X分
William有Y分
2Y-X=1300 ------- (1)
X+Y=6500 -------- (2)
由 (1) 得 2Y -1300 = X 代入 (2)
得 (2Y -1300) + Y = 6500
3Y = 6500 + 1300
3Y = 7800
Y = 2600
X = 3900
Edward 得分較高 多了 3900-2600 =1300分
2006-10-28 13:06:45 · answer #1 · answered by ? 7 · 0⤊ 0⤋
答得很長，好有心機！
2006-10-31 18:05:55 · answer #2 · answered by 喵喵 2 · 0⤊ 0⤋