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Dua gandaan sepunya yang berturutan bagi nombor x dan (+5) ialah 30 dan 6y. Apakah nilai GSTK bagi dua nombor tersebut jika beza antara dan y  ialah 7.


这是我的答案,不懂对不对。

30×2=6y

      60=6y

      10=y

   y - x = 7

  10-x = 7

       -x  = 7-10

       -x = -3

        x = 3

x=3

y=10

Maka, GSTK/LCM bagi (x=3) dan ((y=10)+5) ialah 15.

谢谢大家的回答。

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哈哈哈哈哈,Travel 抄的被发现了
用户: (11,360 分)
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这是我练习簿的问题,我不懂做得对不对,所以我才来问。

1个回答

+1 投票
用户: (3,760 分)
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The two consecutive common multiples of the numbers x and (y + 5) are 30 and 6y. What is the LCM of the two numbers if the difference between x and y is 7.


6y = 30 x 2    ...    

y - x = 7    ...    

From ,

6y = 30 x 2

6y = 60

y = 10   ...    

Substitute  into ,

10 - x = 7

-x = 7 - 10

-x = -3

x = 3

The LCM of x and y + 5

= 3 x 5

= 15

   3 |3 , 15 

   5 |1 , 5   

       1, 1    

用户: (11,360 分)
Please explain how to do. Thank you for your answer and explaination.
用户: (11,360 分)
Thank you very much. You really help me a lots.
用户: (3,760 分)
I don’t know whether my answer is correct or not. Please refer to the sample answer. It is better to ask help from your teacher or friends.
用户: (11,360 分)
I see the answer is 15 but I don't know the method to solve this promblem. Lastly, thank you for your reply.
用户: (3,760 分)
修改于 用户:
You could refer to my new edit. You can use either substitution method or elimination method to solve this problem.
用户: (11,360 分)
Thank you very much. You actually help me a lots.
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