Question

Fifteen years hence a man will be just four times as old as as he was 15 years ago. What is his present age?

Answer 1

Let the present age be as x...
 
EQUATION :

(x + 15) = 4 * ( x -15  )
x + 15 = 4x - 60
x - 4x = -60 - 15
-3x = - 75
x = 75/3
= 25 yrs
 SO, his present age is 25 yrs..

Answer 2

Answer:

The present age is 25

Step-by-step explanation:

Step 1: Given Data: 15 years hence a man will be 4 times as he was 15 years ago Find his present age

Assume the present age be as x...

Step 2:

(x + 15) = 4 x (x -15) ------------ (1) (Add 15 in LHS and Subtract 15 in RHS)

x + 15 = 4x - 60

x - 4x = -60 - 15

Step 3:

-3x = - 75  

x = 75/3

= 25 yrs

The value of x is 25