Question

A father is 1 year older than 3 times the age of his son the son is 20 years old

Answer 1

20 x 3= 60 + 1 = 61 is your answer

Answer 2

x is the son's age = 20

1 + 3x  
= 1 + 3(20)
= 1 + 60
= 61

so father's age = 61
son's age = 20