Question

Mothers present age is 6 times the age of her son, After 5 years the mothers age will be 4 times that times the age of her son. What will be the presents age of a son ?

Answer 1

Let mothers age be x & son's age be y.

$x=6y$

$(x+5)=4(y+5)$

$\Rightarrow (6y+5)=4y+20$

$\Rightarrow 6y-4y=20-5$

$\Rightarrow 2y=15$

$\Rightarrow y=7.5$.