(((唔該各位幫我計下，十分感激，THX.......)))))
更新1:
sorry,,個答案係$2.75, thx
Discount
2007-12-24 1:05 am
Peter bought a dozen of pens at 45% discount and saved $27 . Find the selling price of each pen.
(((唔該各位幫我計下，十分感激，THX.......)))))
(((唔該各位幫我計下，十分感激，THX.......)))))
回答 (3)
2007-12-24 1:26 am
✔ 最佳答案
let x be the selling price of a dozen of pensx - x(1-45%) = 27 ...求左1 打既售價先 ,題目話折扣既45% 就平27元 ,27元係售價減折完平左既數
x - 0.55x = 27
x (1- 0.55 ) = 27
0.45x = 27
x = $60 ....一打鉛筆售60元 ,但不是答案 ,仲要除左12先
the selling price of each pen is $5 (= $60/12)
2007-12-24 1:52 am
設Y為一打筆
Y * 45% = $27
Y = $27 / 45%
Y = $60
一打筆為$60
一支筆為$60 / 12 = $5
Y * 45% = $27
Y = $27 / 45%
Y = $60
一打筆為$60
一支筆為$60 / 12 = $5
參考: ME
2007-12-24 1:15 am
let $y be the selling price of each pen.
12y*45%=27
12y=30
y=2.5
the selling price of each pen is $2.5
12y*45%=27
12y=30
y=2.5
the selling price of each pen is $2.5
參考: me
收錄日期: 2021-04-19 17:42:29
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