Question

karl is twice as old bob. Nine years ago, karl was three times as old as bob. How old is each now?"

Answer 1

Answer:

Karl's age = 36

Bob's age = 18

Step-by-step explanation:

let Karl's age be x

Bob's age be y

present age of Karl is twice of bob

x = 2y equ (1)

9 years ago

x - 9 = 3(y - 9)

x - 9 = 3y - 27

x - 3y = - 27 + 9

x - 3y = - 18 equ (2)

substitute equ (1) in (2)

2y - 3y = - 18

- y = - 18

y = 18

x = 2y

x = 2 × 18

x = 36