7k-(9k-16)=14-(19-k)

👨🏻‍🏫 學術台數學

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2008-10-16 1:35 am

7k-(9k-16)=14-(19-k)

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回答 (3)

Chun Hin

2008-10-18 8:22 pm

✔ 最佳答案

7k-(9k-16)=14-(19-k)
7k-9k+16 =14-19+k
-2k+16 =-5+k
21 =3k
k =7
The answer is 7.

Hope I can help you.

參考: my maths knowledge

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tsz ming

2008-10-20 1:50 am

7k-(9k-16)=14-(19-k)
7k-(9k)-(-16)=14-(19)-(-k)
7k-9k+16=14-19+k
-2k+16=-5+k
-2k-k=-5-16
-3k=-21
k=7

參考: myself

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吳芝亞

2008-10-16 1:38 am

7k-(9k-16)=14-(19-k)
7k-9k+16=14-19+k
-2k+16=-5+k
21=3k
k=7

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