Question 1116684: Dan is 20 years old and his father is 44. How old was dan when his father was three times his age. Found 2 solutions by josgarithmetic, ikleyn:Answer by josgarithmetic(39618) (Show Source):
Let x = "how long years ago . . . "
44-x = 3*(20-x)
44-x = 60-3x
-x+3x = 60-44
2x = 16
x = 8 -------8 years ago
8 years ago Dan was 20-8 = 12 years old.
Answer. Dan was 12 years old when his father was three times his age.
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