7k-(9k-16)=14-(19-k)
點計
最好列埋式
THX
中一數學(THX)(急................................................)
2007-09-28 4:42 am
回答 (7)
2007-09-28 5:37 am
✔ 最佳答案
7k-(9k-16)=14-(19-k)7k-9k+16=14-19+k (因為16和k之前都是負, 所以負x負=正)
7k-9k-k=14-19-16 (先把有k的數放到一邊, 而數字又一邊)
-3k= -21 (將它們加減起來)
3k=21 (這時候, 兩邊的負符數就能相約)
3k/3 = 21/3 (再把3k除開)
k=7 (把21除3後就完成)
I hope I can help you
2007-10-02 4:20 am
OK!GD
2007-09-28 6:59 am
7k-(9k-16) =14-(19-k)
7k-9k+16 =14-19+k
-2k+16 = -5+k
21 =3k
k = 7
7k-9k+16 =14-19+k
-2k+16 = -5+k
21 =3k
k = 7
2007-09-28 5:03 am
7K-(9K-16)=14-(19-K)
7K-(9K-16)+(19-K)=14
7K-9K+16+19-K=14
7K-9K-K=14-16-19
-3K=-21
K=-21/-3
K=7
___________________
http://www.successplace.us
http://slim-chance.hk88.biz
7K-(9K-16)+(19-K)=14
7K-9K+16+19-K=14
7K-9K-K=14-16-19
-3K=-21
K=-21/-3
K=7
___________________
http://www.successplace.us
http://slim-chance.hk88.biz
2007-09-28 4:50 am
第一:拆括號
7k-9k+16=14-19+k
第二:將未知數k做首項
-2k-k= -5-16
-3k= -21
k=7
7k-9k+16=14-19+k
第二:將未知數k做首項
-2k-k= -5-16
-3k= -21
k=7
2007-09-28 4:48 am
7k-9k+16=14-19+k
7k-9k-k=14-19-16
-3k= -21
k=7
7k-9k-k=14-19-16
-3k= -21
k=7
2007-09-28 4:47 am
7k-(9k-16)=14-(19-k)
7k-9k+16=14-19+k
7k-9k-k=14-19-16
-3k=-21
k=-21/-3
k=7
7k-9k+16=14-19+k
7k-9k-k=14-19-16
-3k=-21
k=-21/-3
k=7
收錄日期: 2021-04-13 15:06:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070927000051KK03690