please help me math solve:5/8=40/x?

2008-10-11 5:10 am

回答 (12)

2008-10-11 5:13 am

✔ 最佳答案

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2016-05-25 11:41 am

English

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2008-10-13 9:37 am

40 / 64 = 40 / x
x = 64

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2008-10-11 12:02 pm

5/8 = 40/x
5x/8 = 40
5x = 8(40)
5x = 320
x = 320/5
x = 64

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2008-10-11 5:17 am

Dissecting each stage in this formula:

5/8 = 40/?

40/5 = 8*8=64

參考: 64 is the answer.

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2008-10-11 5:17 am

cross multiply
5x=(8)(40)
5x=320
320/5=x
x= 64

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2008-10-11 5:16 am

For this type of question, you can do cross multiplication. You do 40 times 8 which is 320 and then divide that by 5. So x equals 64.

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2008-10-11 5:15 am

5/8 = 0.625

x = 64

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2008-10-11 5:14 am

5/8 = 40/x

(5/8)x = 40

x = 40/(5/8)

x = 40 / 0.625

x = 64

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2008-10-11 5:13 am

40/5 =8
8*8 = 64
so x=64.

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