The average age of man and his son is 28 years the ratio of their ages 3 : 1 respectively what is the man's age

Answer 1

man's age --- 3x
non' age ---- x
(note 3x : x = 3 : 1)

so (3x + x)/2 = 28
4x = 56
x= 14

finish it up

Answer 2

Please explain