1.X(1-15%)+1.5X=4.7
請計出以上題目,包括列式步驟!
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小六方程式計算1題~
2008-06-18 5:31 am
回答 (5)
2008-06-18 5:59 am
✔ 最佳答案
x(1-15%)+1.5x =4.7
x(85%)+1.5x=4.7
x(85/100)+1.5x=4.7
0.85x+1.5x=4.7
2.35x=4.7
x=4.7/2.35
x=2
2008-06-18 9:36 pm
X(1-15%)+1.5X=4.7
X-(15/100)X+1.5X=4.7
X-(3/20)X+(2/3)X=4.7
(17/20)X+(30/20)X=4.7
(47/20)X=4.7
(47/20)X*20=4.7*20
47X=94
47X/47=94/47
X=2
X-(15/100)X+1.5X=4.7
X-(3/20)X+(2/3)X=4.7
(17/20)X+(30/20)X=4.7
(47/20)X=4.7
(47/20)X*20=4.7*20
47X=94
47X/47=94/47
X=2
參考: By myself.夠詳細嗎?
2008-06-18 6:35 pm
X(1-15%)+1.5X=4.7
首先計左(1-15%)先...用小數表示方便d~~...
=100%-15% = 85% = 0.85
=>0.85X + 1.5 X =4.7
之後用抽因子抽X
=>(0.85+1.5) X =4.7
=> X = 4.7 / (0.85+1.5)
= 2
首先計左(1-15%)先...用小數表示方便d~~...
=100%-15% = 85% = 0.85
=>0.85X + 1.5 X =4.7
之後用抽因子抽X
=>(0.85+1.5) X =4.7
=> X = 4.7 / (0.85+1.5)
= 2
收錄日期: 2021-04-24 08:24:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080617000051KK02818