SOLUTION: A father is 3 years old as his son. In 12 years he will be twice as old as his son. How old is the fathr and son?

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Question 766799: A father is 3 years old as his son. In 12 years he will be twice as old as his son. How old is the fathr and son?
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Father is 3 times his son's age
f = 3d
In 12 years the father will be twice as old as his son.
f + 12 = 2(d + 12)
Substitute 3d for f in equation.
3d + 12 = 2(d + 12)
3d + 12 = 2d + 24
d = 12 (Son's age)
Substitute d = 12 into f = 3d
f = 3(12)
f = 36
So, father's age = 36
son's age = 12
Hope this helps.
:-)