Father's age is twice the sum of Bob's and Jack's age.
If Bob is older than Jack by 4 years and their total age is 96,
how old is the father?
Please help me!!!
Maths...
2007-10-01 8:57 pm
回答 (3)
2007-10-01 9:07 pm
✔ 最佳答案
Let x years old be the age of Jack.x+x+4+2(x+x+4)=96
x=14
therefore, father's age =2(14+14+4)=64
2007-10-01 9:11 pm
=48吧~
列式:
96÷2
=48
∵你話佢阿爸既歲數係佢地既歲數既ＤＯＵＢＬＥ呀嘛～～
我諗係咁掛～～=V=''
列式:
96÷2
=48
∵你話佢阿爸既歲數係佢地既歲數既ＤＯＵＢＬＥ呀嘛～～
我諗係咁掛～～=V=''
參考: 自己的腦袋
2007-10-01 9:04 pm
Let Jack's age is y;
Then Bob's age is y+4;
Their father's age is (y+y+4)x2= 4y+8
y+(y+4)+(4y+8)=96
6y+12=96
6y=96-12
6y=84
y=14
Therefore, Their father's age is 4 x 14 +8 = 64 years old.
2007-10-01 13:05:51 補充：
Jack's age will be 14 years old.Bob's age will be 14 4 = 18 years old.The sum of Jack & Bob's age is 14 18 = 32.So thier father's age (64 years old) is twice of the sum of Jack & Bob's age.
Then Bob's age is y+4;
Their father's age is (y+y+4)x2= 4y+8
y+(y+4)+(4y+8)=96
6y+12=96
6y=96-12
6y=84
y=14
Therefore, Their father's age is 4 x 14 +8 = 64 years old.
2007-10-01 13:05:51 補充：
Jack's age will be 14 years old.Bob's age will be 14 4 = 18 years old.The sum of Jack & Bob's age is 14 18 = 32.So thier father's age (64 years old) is twice of the sum of Jack & Bob's age.
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