38. x/a+x/b=c/d find x
39.ax-b/x-d=e find x
5.-xy+4x
快快快!!!!問幾題數學題!!
2006-11-14 3:32 am
回答 (4)
2006-11-14 3:54 am
✔ 最佳答案
38) x/a+x/b=c/d xbd/abd+xad/abd=abc/abd
xd(a+b)/abd=abc/abd
xd(a+b)=abc
x=abc/d(a+b)
39) ax-b/x-d=e
x(a+b/d)=e
x=e/(a+b/d)
5) -xy+4x
x(-y+4)
2006-11-14 3:57 am
have you learnt factorized?
If yes, the solution of the fifthe question is simply.............
-x(y - 4).................
you have known the answers of the first two questions.....
38. x = abc / ad + bd
39 . ..........the answer is not correct until now............
maybe I can tell you later
If yes, the solution of the fifthe question is simply.............
-x(y - 4).................
you have known the answers of the first two questions.....
38. x = abc / ad + bd
39 . ..........the answer is not correct until now............
maybe I can tell you later
參考: me
2006-11-14 3:50 am
38.
x/a+x/b=c/d
(ax+bx)/ab=c/d
ax+bx=abc/d
x(a+b)=abc/d
x=(abc/d)/(a+b)
x=abc/(ad+db)
未寫完問題嗎？
x/a+x/b=c/d
(ax+bx)/ab=c/d
ax+bx=abc/d
x(a+b)=abc/d
x=(abc/d)/(a+b)
x=abc/(ad+db)
未寫完問題嗎？
2006-11-14 3:48 am
38. x/a+x/b=c/d
(a+b)x/ab=c/d
x=abc/d(a+b)
=abc/ad+ab
39.ax-b/x-d=e
ax-b=ex-de
(a-e)x=b-de
x=b-de/a-e
2006-11-13 19:49:44 補充：
38. is wrong x=abc/ad+bd
2006-11-13 19:50:00 補充：
38. is wrong x=abc/ad+bd
(a+b)x/ab=c/d
x=abc/d(a+b)
=abc/ad+ab
39.ax-b/x-d=e
ax-b=ex-de
(a-e)x=b-de
x=b-de/a-e
2006-11-13 19:49:44 補充：
38. is wrong x=abc/ad+bd
2006-11-13 19:50:00 補充：
38. is wrong x=abc/ad+bd
參考: me
收錄日期: 2021-04-22 00:14:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061113000051KK03461