一元一次方程式..急!!!!!!!!!!!!!!!!

2008-07-30 7:29 pm

問題:
明年子晴的年齡是爸爸1/3,若爸爸明年39歲,子晴今年多少歲?
(要式&答案)

回答 (3)

2008-07-30 7:43 pm

Let x be the gril years,

3x=39

x=39/3

x=13

thr gril is 13 years

2008-07-30 11:44:03 補充：
no thanks ^-^

參考: maths teacher

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2008-07-30 7:38 pm

39x1/3-1
=13-1
=12
i think=3=

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2008-07-30 7:33 pm

let the age of 子晴 is x this year

x 1=39(1/3)
x=13-1
x=12
the age of 子晴 is 12

2008-07-30 11:34:49 補充：
x+1=39(1/3)

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