Question

When, Marie was 12 years old, Johnny was thrice the age of Marie. Now, Marie is 21 years old. Find the age of Johnny.

Answer 1

Answer:

63

Step-by-step explanation:

Marie is 21 years old

=21 ×3 =63

Answer 2

Answer:

63

Step-by-step explanation:

let age of Marie  = x = 12

ATQ

johnny = 3x

= 3*12

= 36

when Marie is 21

johnny = 3*21

= 63