Question

In 5 years time, Reshma will be three times old as she was 9 years ago. How old is she now?

Answer 1

Let Reshma's present age be $x$ years.
9 years ago she was $x-9$ years.
5 years from now she will $x+5$ years.
According to the condition, the equation becomes
$x+5=3(x-9)$
$\Rightarrow x+5=3x-27$
$\Rightarrow 5+27=3x-x$
$\Rightarrow 2x=32$
$\Rightarrow x=16$