結果m=12
我唔知點計出黎,可唔可以幫我解釋一下,thank you!
更新1:
請問0.842m點變出黎?
數學問題,希望有人幫我解釋一下!
回答 (2)
2008-05-14 5:12 am
✔ 最佳答案
m/(m+64) *100% = 15.8%m/(m+64) = 15.8%/100%
m = 0.158(m+64)
m = 0.158m + 10.112
0.842m = 10.112
m = 12.0(3s.f.)
2008-05-14 18:29:22 補充：
1m - 0.158m = 10.112
m(1 - 0.158) = 10.112
0.842m = 10.112
m = 12.0(3s.f.)
參考: me
2008-05-14 5:41 am
m
----- x 100% = 15.8%
m + 64
m/m+64 = 15.8% --------------- --because 100% = 1
m/m+64 = 15.8/100--------(it comes from 15.8%)
100m/m+64 = 15.8
100m= 15.8 x (m+64)
100m = 15.8m + 1011.2
100m - 15.8m = 1011.2
84.2m = 1011.2
m = 12
----- x 100% = 15.8%
m + 64
m/m+64 = 15.8% --------------- --because 100% = 1
m/m+64 = 15.8/100--------(it comes from 15.8%)
100m/m+64 = 15.8
100m= 15.8 x (m+64)
100m = 15.8m + 1011.2
100m - 15.8m = 1011.2
84.2m = 1011.2
m = 12
收錄日期: 2021-04-24 08:12:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080513000051KK02675