SOLUTION: When Billy turned 14 years old, his father was 42 years old, which is three times Billy’s age at the time. Today is Billy’s birthday, and Billy’s father is now twice as old as Bil
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Question 573560: When Billy turned 14 years old, his father was 42 years old, which is three times Billy’s age at the time. Today is Billy’s birthday, and Billy’s father is now twice as old as Billy. How old is Billy?
Found 2 solutions by nrussell1945, Maths68:
Answer by nrussell1945(3) (Show Source): You can put this solution on YOUR website!
This is a trick question. If Billy was 14, and he aged x number of years, then his father would have aged x number of years too. If billy was 21, and his father was 42, and billy aged one year, than his father would age one year, unless he was cryogenically frozen or on another planet further from the sun, in which case his birthdays would just be farther apart.
The answer is: NO SOLUTION
Answer by Maths68(1474) (Show Source): You can put this solution on YOUR website!
Let
age of Bill now = b
age of Father now = f
Billy’s father is now twice as old as Billy
f=2b..............(1)
Let x years ago
Bill was
b-x = 14..............(2)
Father was
f-x = 42..............(3)
Put the value of f from (1) to (3)
f-x = 42..............(3)
2b-x=42...............(4)
Subtract (2) from (4)
2b-x=42...............(4)
-b+x = -14..............(2)
-----------
b=28
Put the value of b in (1)
f=2b..............(1)
f=2(28)
f=56
age of Bill now = b = 28 years old
age of Father now = f = 56 years old
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