Question

A father is 30 years older than his son .in 12 years,the man will be three times as old as his son. find thier present ages

Answer 1

let the son's present age be x
then, 3 ( x + 12 ) = (30 + x) + 12
= 3x + 36 = 42 + x
= 3x - x = 42 - 36
= 2x = 6
x = 3
so, their present age is 3 and 33 respectively.