Question 808163
let m = man's present age
let d = daughters's
let s = son's
:
Write an equation for each statement:
:
A man has a daughter and a son.
 The son is three years older than the daughter is now.
s = d+3
 In ten years the man will be fourteen years older than the combined ages of his children at that time.
m + 10 = (s+10) + (d+10) + 14
m = s + d + 34 - 10
m = s + d + 24
Replace s with (d+3)
m = d + 3 + d + 24
m = 2d + 27
That's about all we can do with it, we have three unknowns and only 2 equations.