Question 672288
«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

(3d - 6) + (d - 6)= 36 ► 4d - 12 = 36
4d = 48 ► d = 12
«find the age of the daughter» => daugther is 12 years old