Question

After 12 years Shalabh will be three times as old as he was 4 years ago. Find his age

Answer 1

Answer:

12

Step-by-step explanation:

lets show age as= x

after 12 years

x + 12 = 3 (x - 4)

x + 12 = 3(x - 4)

x + 12 = 3x - 12

3x - x = 12 + 12

2x = 24

x = 12

Answer 2

Let the present age of Shalabh be x.

After 12 years = x+12

Before 4 years = x-4

x+12 = 3(x-4)

⇒ x+12 = 3x - 12

⇒ 12+12 = 3x - x

⇒ 24 = 2x

⇒ $\frac{24}{2} = x$

⇒ 12 = x

Present age of Shalabh = x = 12 years

Shalabh's age after 12 years = x+12 = 12+12 = 24 years

Shalabh's age before 4 years = x-4 = 12-4 = 8 years