Asked by Martin
A father was three times as old as his son fifteen years ago and four times his sons age nineteen years ago. When was the father twice as old as the son?
Answers
Answered by
Steve
f-15 = 3(s-15)
f-19 = 4(s-19)
solve for s and f, and then find x such that
f-x = 2(s-x)
f-19 = 4(s-19)
solve for s and f, and then find x such that
f-x = 2(s-x)
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