Question

15 years later a man will be four times as old as he was 15 years ago how old is he now​

Answer 1

the answer is 15 years

Answer 2

$\textbf{\underline{Answer :- }}$

The present age of the man is 25 years.

$\textsf{\underline{Given :-}}$

15 years later : His age will be 4 times of her age 15 years ago.

$\textsf{\underline{To find:-}}$

Man's present age.

$\textsf{\underline{Solution :-}}$

Consider man's age as x

$\tt{\implies \: x + 15 = 4(x - 15)}$

$\tt{\implies \: x + 15 = 4x - 60}$

$\tt{\implies \: x - 4x = - 60 - 15}$

$\tt{\implies - 3x = - 75}$

$\tt{\implies{\cancel{ - }} \: 3x = {\cancel{ - }} \: 75}$

$\tt{\implies \: 3x = 75}$

$\tt{\implies \: x = \dfrac{75}{3} }$

$\tt{\implies \: x = 25}$

The man's present age is 25

$\textbf{\underline{Verification :-}}$

$\tt{\implies25 + 15 = 4(25 - 15)}$

$\tt{\implies40 = 100 - 60}$

$\tt{\implies40 = 40}$

$\therefore$LHS = RHS

$\therefore$The present age of the man is 25 years.