Father and son

Father is three times older than his son. 12 years ago father was nine times older than the son. How old are father and son?


x =  48
y =  16


x = 3y
x-12 = 9(y-12)

x-3y = 0
x-9y = -96

x = 48
y = 16

Calculated by our linear equations calculator.

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