You can put this solution on YOUR website! A woman is three times as old as her daughter.
w = 3d
six years ago the sum of their ages was 36.
(w-6) + (d-6) = 36
w + d - 12 = 36
w + d = 36 + 12
w + d = 48
find the age of the daughter
replace w with 3d
3d + d = 48
4d = 48
d = 48/4
d = 12 yrs is the daughter's age