數學問題7
回答 (6)
2006-11-17 7:49 am
✔ 最佳答案
設x=每個人（10個）所得故10x=8(x+30)
10x=8x+30
2x=30
x=15
每個人（10個）所得15元
故該筆款項的總數:
15*10=150元
2006-11-16 23:54:49 補充：
對不起！做快了，遺漏了8*30=240故該是：設x=每個人（10個）所得故10x=8(x 30)10x=8x 2402x=240x=120每個人（10個）所得120元故該筆款項的總數:120*10=1200元
參考: me
2006-11-17 7:37 pm
$1200.00
2006-11-17 7:59 am
You should declare two equation,
Equation 1
10 people will get X dollars per each.
8 people will get Y dollars per each
10X = 8Y
Equation 2
出席的每個人可多得$30
Y-X = 30
From equation 1,
10X=8Y
X=0.8Y -- sub it to equation 2
From equation 2
Y-X = 30
Y-0.8Y=30
Y=30/0.2=150
The total amount = 8Y = 8*150 = 1200
Equation 1
10 people will get X dollars per each.
8 people will get Y dollars per each
10X = 8Y
Equation 2
出席的每個人可多得$30
Y-X = 30
From equation 1,
10X=8Y
X=0.8Y -- sub it to equation 2
From equation 2
Y-X = 30
Y-0.8Y=30
Y=30/0.2=150
The total amount = 8Y = 8*150 = 1200
參考: my exp
2006-11-17 7:54 am
10 - 2 x (30)
------------------- x 10 = 總數
2
240
------ x 10 = 總數
2
120 x 10 = 1200
------------------- x 10 = 總數
2
240
------ x 10 = 總數
2
120 x 10 = 1200
參考: y
2006-11-17 7:50 am
設該款項的總數為$A
A/(10-2) - A/10 = 30
A/8 - A/10 = 30
A (1/8 - 1/10) = 30
A (1/40) = 30
A = 1200
答: 款項的總數是$1200
A/(10-2) - A/10 = 30
A/8 - A/10 = 30
A (1/8 - 1/10) = 30
A (1/40) = 30
A = 1200
答: 款項的總數是$1200
參考: 自己
收錄日期: 2021-04-12 19:04:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061116000051KK05083