請例式。
更新1:
B的年紀是A的一半，亦是C的三分2。如他們三人的年齡總和為63，求他們的年齡 吾好意士，應該係三分二，唔係三分一。
數學應用題１０點
回答 (3)
2008-07-13 5:18 am
✔ 最佳答案
先設B今年x歲2x +x +3x/2 = 63
3x +3x/2 = 63
6x/2 +3x/2 =63
9x/2=63
x=14
B今年14歲,A今年28歲,C今年21歲
2008-07-12 6:24 am
b*2=a b*3=c
b+b*2+b*3=b*6
63*6=10.5
b=10.5
a=21
c=31.5
b+b*2+b*3=b*6
63*6=10.5
b=10.5
a=21
c=31.5
2008-07-11 7:22 pm
Let age of B be x.
Then age of A will be 2x.
Age of C will be 3x. Therefore,
x +2x + 3x = 63
6x = 63
x=10.5
That is age of A is 21, age of B is 10.5 and age of C is 31.5.
Then age of A will be 2x.
Age of C will be 3x. Therefore,
x +2x + 3x = 63
6x = 63
x=10.5
That is age of A is 21, age of B is 10.5 and age of C is 31.5.
收錄日期: 2021-04-25 22:37:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080711000051KK00699