Question

Fifteen years from now david's age will be four times his present age. what is david's present age?

Answer 1

let present age be x then x + 15 = 4x and and is 5 in end -3x = -15 then according to rule - and - cancel so and x = 15/3 so and is 5 yrs

Answer 2

$\bf{\underline{\underline{Answer:}}}$

$\bf{\therefore 5 \:years}$

$\bf{\underline{\underline{Step\: by\: step \:explanation:}}}$

Let present age of David = $4x$

15 years after age =$\: x + 15$

$\bf{According\: To \:Question⟹}$

$x + 15 = 4x$

$15 = 4x - x$

$15 = 3x$

$x = \dfrac{\cancel{15}^5}{\cancel3}$

$\bf x = 5$

$\bf The \:present\: age\: of \:David = 5 \:years$