The age of Jack is twice the sum of the ages of his two friends, after 5 years his age will be twice the sum of their age
Find the present Age
How do I do this?
Please Explain
Answers
Step-by-step explanation:
- Let the age of Jack's 1 St friend be x
- Let the age of Jack's 2 nd friend be y
According to first condition
Jack's age will be twice the sum of the age
of their two friend
Hence Jack's age will be= 2(x+y) ----------1
Now,
According to second condition
After fiveyear means five year hence his age
will be twice the sum of the age of their
friends
Hence 5+jack age = 2((5+x)+(5+y))
Therefore 5+jack age=2(10+x+y)
Therefore Jack age=2(10+x+y)-5 ----------2
Hence by eq 1 nd 2
2(x+y)=2(10+x+y)-5
Dividing both the side by 2 we get
(x+y)=(10+x+y)-5
(x+y)= -10-x-y-5
By arranging
15= - x-x-y-y
15= - 2x-2y
Dividing by - 1
- 15=2(x+y)
x+y= - 15/2
Put this value in eq 1
2( - 15/2)= Jack age
Therefore Jack age be = - 15
But age can't be negetive hence question is wronge
Hence check your question properly