數學唔識??
回答 (2)
2007-08-21 6:26 am
✔ 最佳答案
30W + 20(W+1) = 24[ W+(W+1) ]30W + 20W + 20 = 24(2W + 1 )
50W +20 = 48W + 24
50W - 48W = 24 - 20
2W = 4
W = 2
2007-08-21 20:16:01 補充：
驗算:W=230W + 20(W+1) = 24[ W+(W+1) ]30(2) + 20( 2+1) = 24[ 2+ (2+1) ]60 + 60 = 24(5)120 = 120驗算顯示: 左右答案相等(=120)， 所以W=2這個答案是對的。
參考: me
2007-08-21 6:28 am
30W + 20(W+1) = 24[ W+(W+1) ]
30W + 20W + 20 = 24(2W + 1 )
50W +20 = 48W + 24
50W - 48W = 24 - 20
2W = 4
W = 2
30W + 20W + 20 = 24(2W + 1 )
50W +20 = 48W + 24
50W - 48W = 24 - 20
2W = 4
W = 2
收錄日期: 2021-05-03 06:37:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070820000051KK05761