請教中學f.3maths

2006-10-17 12:23 am

1.如果明明每個月節省15%開支,可節省$900,問he每月的開支是?

回答 (5)

2006-10-17 12:28 am

✔ 最佳答案

1. 900/15%
=900/0.15
=6000

he每月的開支$6000

2006-10-16 16:28:31 補充：
樓下的人請不要抄我的答案---$6000

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2006-10-17 1:15 am

1. Let x be the monthly expenses
15% of x = $900
x = $6000

2. Let x be the original amount of the bill
10% of x = $26
x = $260

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2006-10-17 12:33 am

設明明每月的開支是x
x15%=900
x=900/15%
x=6000

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2006-10-17 12:29 am

900/15%=6000

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2006-10-17 12:29 am

假設明明每個月開支是 y

y*15% = 900
y = 900/0.15
y = 6000

明明每個月開支是 $6000

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