Question

present age of subramaniam's mother is six times subramaniam's age. five years hence, her age will be 20 years more than that of subramaniam's age. find there present age.

Answer 1

form two equation
let the mothers age be x and that of son's is y
so at present
$x = 6y \\ x + 5 = y + 5 + 20 \\ x = y + 20$
solving the above two equation we get
$y = 4 \\ x = 24$