philip is 3 times as old as his daughter.if the difference of their ages is 36, find the ages of philip and his daughter.
philip既歲數係佢個女既3倍...如果佢地既age係相差36 歲 ....佢地幾多歲呢?
一定要例式~!
f.2數學 唔識點計
2008-02-22 1:29 am
回答 (7)
2008-02-22 1:34 am
✔ 最佳答案
設女兒是 x :3x - x = 36
2x = 36
x = 18
答:
女兒是 18 歲
philip 是 3(18)=54歲
參考: me
2008-02-22 2:11 am
x = 18
=.=
=.=
2008-02-22 2:04 am
Let Philip's age is x and his daughter's age is y
x-y=36 and x=3y
Sub x=3y into x-y=36
3y-y=36
2y=36
y=18
Since x=3y
x=3x18
x=54
x-y=36 and x=3y
Sub x=3y into x-y=36
3y-y=36
2y=36
y=18
Since x=3y
x=3x18
x=54
2008-02-22 1:37 am
Let X be philip age;
Let y be philip daughter age;
"philip is 3 times as old as his daughter"
Therefore 3y = X ; (Eq1)
"if the difference of their ages is 36,"
Threfore X-y = 36; (Eq2)
Subsitute Eq1 into Eq2
3y - y = 36
2y = 36
y = 18
Put y = 18 into Eq 1
X = 3x18
X = 54
i.e. Philip is 54 years old and Philip daughter is 18
Let y be philip daughter age;
"philip is 3 times as old as his daughter"
Therefore 3y = X ; (Eq1)
"if the difference of their ages is 36,"
Threfore X-y = 36; (Eq2)
Subsitute Eq1 into Eq2
3y - y = 36
2y = 36
y = 18
Put y = 18 into Eq 1
X = 3x18
X = 54
i.e. Philip is 54 years old and Philip daughter is 18
2008-02-22 1:37 am
Let age of philip be x,his daughter be y
x-y=36------1
x=3y---------2
put 2 into 1
2y=36
y=18
put y=18 into 1
x=54
THUS,the age of philip is 54,his daughter is 18
x-y=36------1
x=3y---------2
put 2 into 1
2y=36
y=18
put y=18 into 1
x=54
THUS,the age of philip is 54,his daughter is 18
2008-02-22 1:36 am
Let Philip's age is x and his daughter's age is y
x-y=36 and x=3y
Sub x=3y into x-y=36
3y-y=36
2y=36
y=18
Since x=3y
x=3x18
x=54
So Philip is 56 years old and his daughter is 18 years old
2008-02-21 17:37:54 補充：
So Philip is 54 years old and his daughter is 18 years old
x-y=36 and x=3y
Sub x=3y into x-y=36
3y-y=36
2y=36
y=18
Since x=3y
x=3x18
x=54
So Philip is 56 years old and his daughter is 18 years old
2008-02-21 17:37:54 補充：
So Philip is 54 years old and his daughter is 18 years old
參考: Myself
2008-02-22 1:34 am
我想問是唔是二元一次式
收錄日期: 2021-04-19 23:15:33
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