Question

21 years from now, I will be 4 times as old as my present age. what is my present age?

Answer 1

Consider present age as X

21 years from now is X+21

Given,

X + 21 = 4 X

4 X - X = 21

3 X = 21

X = 21/ 3

= 7....

Answer 2

I think tis will be helpful....