You can put this solution on YOUR website! father is twice as old as his son.
f = 2s
three years ago, he was 19 less than thrice the age of his son.
f - 3 = 3(s-3) - 19
f - 3 = 3s - 9
f = 3s - 9 - 19 + 3
f = 3s - 25
replace f with 2s
2s = 3s - 25
25 = 3s - 2s
s = 25 yrs is the son's age
ad
2(25) = 50 yrs is the father's age
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See if that checks out in the statement
"three years ago, he was 19 less than thrice the age of his son."
50 - 3 = 3(25-3) - 19
47 = 3(22) - 19
47 = 66 - 19
