中一數學題目
2009-11-25 7:38 am
York has $72.Sally has $12.In order to let Sally have 3 time the amount of York,how much should York give Sally.(用方程式)
回答 (5)
2009-11-25 7:41 am
✔ 最佳答案
Let the amount required be $x
York will have $(72 - x) while Sally will have $(12 + x)
3(72 - x) = (12 + x)
216 - 3x = 12 + x
204 = 4x
x = 51
York should give Sally $51
2009-12-05 9:31 am
Let the amount that Sally gives $x.
3(72-x)=12+x
3*72-3x=12+x
-3x-x=12-216
-4x=-204
x =-204over-4
x =51
The amount that Sally gives$51
3(72-x)=12+x
3*72-3x=12+x
-3x-x=12-216
-4x=-204
x =-204over-4
x =51
The amount that Sally gives$51
參考: myself
2009-11-26 3:58 am
York has $72.Sally has $12.In order to let Sally have 3 time the amount of York,how much should York give Sally.
Let $y should York gives Sally,3(72-y)=12+y
216-3y=12+y
216-12=y+3y
204=4y
y=51
∴York should gives Sally $51
Hope can help you~^_^
Let $y should York gives Sally,3(72-y)=12+y
216-3y=12+y
216-12=y+3y
204=4y
y=51
∴York should gives Sally $51
Hope can help you~^_^
參考: I know how to do....because my maths book has this question.^_^
2009-11-26 2:46 am
設York要給Sally x元
4x=72+12
4x=84
4x/4=84/4
x=24
*York要給Sally24元
2009-11-25 18:49:07 補充：
SORRY,應該係York要給Sally(71-x)元
答案應該係47元
4x=72+12
4x=84
4x/4=84/4
x=24
*York要給Sally24元
2009-11-25 18:49:07 補充：
SORRY,應該係York要給Sally(71-x)元
答案應該係47元
參考: ME, me
收錄日期: 2021-04-24 10:12:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091124000051KK01631