Question

Find years ago a man was seven times as old as his daughter. Find years hence, the man will be three times as old as his daughter. Find their present age?

Answer 1

hope this helps you ask if any doubt

Answer 2

let the man and his daughter age X and Y
ATQ
case 1 :
x-5 = 7 (y-5)
x-5=7y-35
x-7y=-30-------------(1)
case:2
x+5 = 3 (y+5)
x+5=3y+15
x-3y = 10-----------(2)

elimination method or you you can use any other method
y=10
on putting in any one equation
x =40