close
標題:
中一數學問題(百份數)
發問:
Peter bought a dozen of pens at 45% discount and saved $27.Find the selling price of each pen. 更新: 教下點計！答案係2.75
最佳解答:
其他解答:
Let $y be the selling price of each pen. 12y x (1-45%) = 12y - 27 12y x 0.55 = 12y - 27 6.6y = 12y -27 5.4y=27 y=5 ∴The selling price of each pen is $5|||||let x be the original selling price x(45%)=27 x=$60 the new selling price =60(1-45%) =$33 selling price of each pen =33/12 =$2.75|||||答案冇可能係2.75，係5 因為45%x=27(設x係12支筆的價錢) 因此27/45%=x x=60元(12支筆) 再計每支的價錢，即60/12=5 所以應該係每支5元
中一數學問題(百份數)
發問:
Peter bought a dozen of pens at 45% discount and saved $27.Find the selling price of each pen. 更新: 教下點計！答案係2.75
最佳解答:
此文章來自奇摩知識+如有不便請留言告知
Let y be the marked price. 45%y=27 y=60 Therefore the marked each pen is$5. So the selling price is: =(5*12-27)/12 =33/12 =$2.75 Hope that I can help you!!給最佳我吧!! Thanks a lot!!其他解答:
Let $y be the selling price of each pen. 12y x (1-45%) = 12y - 27 12y x 0.55 = 12y - 27 6.6y = 12y -27 5.4y=27 y=5 ∴The selling price of each pen is $5|||||let x be the original selling price x(45%)=27 x=$60 the new selling price =60(1-45%) =$33 selling price of each pen =33/12 =$2.75|||||答案冇可能係2.75，係5 因為45%x=27(設x係12支筆的價錢) 因此27/45%=x x=60元(12支筆) 再計每支的價錢，即60/12=5 所以應該係每支5元
文章標籤
全站熱搜
留言列表
