A woman's age is three years more than twice her son's age. the sum of their ages is 84. How old is the son?

The women’s age plus the sons would be 27

Women age = 3 + 2 S (sons age) (three times more twice her sons age)

their age sum is 84

so women age + son age = 84

lets substitute the value of mothers age

3+2S+S=84

3S=84-3

3S=81

S=27

so sons age is 27