(a)John normally spend on studying in a week?
(b)Simon normally spend on studying in a week?
更新1:
可否不同算式求John normally spend on studying in a week? and Simon normally spend on studying in a week?
幫忙解一解英文數學題...10分!!!!(方程式)
2006-10-21 11:39 pm
The number of hours John spends on studying is normally three times that of Simon. This week ,each of them spends 6 hours more on studying .As a result, John spends 12 hours more than Simon. How many hours does
(a)John normally spend on studying in a week?
(b)Simon normally spend on studying in a week?
(a)John normally spend on studying in a week?
(b)Simon normally spend on studying in a week?
回答 (2)
2006-10-22 12:47 am
let the time that John normally spend on studying in a week be 3a hours
let the time that Simon normally spend on studying in a week be a hours
(3a + 6) = 12 + (a + 6)
2a = 12
a = 6
so,
John normally spend on studying in a week = 3x6 = 18hours
Simon normally spend on studying in a week = 6hours
let the time that Simon normally spend on studying in a week be a hours
(3a + 6) = 12 + (a + 6)
2a = 12
a = 6
so,
John normally spend on studying in a week = 3x6 = 18hours
Simon normally spend on studying in a week = 6hours
2006-10-21 11:48 pm
Let x be the hours that Simon normally spent:
(3x + 6) - (x + 6) = 12
2x = 12
x =6
Therefore, John normally spend 3 * 6 = 18 hours on studying
Simon normally spend 6 hours on studying.
(3x + 6) - (x + 6) = 12
2x = 12
x =6
Therefore, John normally spend 3 * 6 = 18 hours on studying
Simon normally spend 6 hours on studying.
參考: 自己
收錄日期: 2021-04-20 13:21:52
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