Question

a man is thrice as old as his son 3 yeasr ago . tha man was 4 times as old as his son. find thier present age

Answer 1

Define x:

Let the son be x

The man = 3x

Express their age 3 years ago:

Son = x - 3

Father = 3x - 3

Solve x:

The man was 4 times as old as his son

3x - 3 = 4(x - 3)

3x - 3 = 4x - 12

x = 9

Find their present age:

son = x = 9 years old

Father = 3x = 3(9) = 27 years old

Answer: The son is 9 and the father is 27 years old