SOLUTION: A man is older than his son by 30 years in how many years will the fathers age be twice his sons age?

Question 935173: A man is older than his son by 30 years in how many years will the fathers age be twice his sons age?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
f = father's present age
s = son's
:
I don't think we have enough information to get a unique solution, anyway
write an equation for each statement
:
A man is older than his son by 30 years
f = s + 30
in how many years will the fathers age be twice his sons age?
let y = no. years for this to be true
f + y = 2(s+y)
f + y = 2s + 2y
f = 2s + 2y - y
f = 2s + y
Replace f with s+30
s + 30 = 2s + y
30 = 2s - s + y
30 = s + y
right here you can see there could be many solutions
If s = 20, y = 10, then f = 50
or
s = 10, y = 20, then f = 40
or
s = 5, y = 25, then f = 35

RELATED QUESTIONS
a man is 30 years older than his youngest son. In 17 years he will be twice his sons age. (answered by lynnlo)

A fathers age is 13 times that of his son. In ten years the sons age will be 1/3of his... (answered by stanbon)

A man is 24 years older than his son. In 2 years he will be twice the age of his son.... (answered by ramkikk66)

a man is 30 years older than his son . in 12 years the man will be 3 times older than his (answered by JulietG)

A man is 6 times as old as his son. In 5 years he will be 2 years older than three times... (answered by ewatrrr,TimothyLamb)

today a man is 5 times the age of his son. in 15 years, the son will be 1/2 his fathers... (answered by jorel1380,robertb,josmiceli)

A man is 18 years older than his son, in 2 years the man will be double his age (answered by TimothyLamb)

A man is 30 years older than his son. In 17 years his son would be half his age. How old... (answered by ankor@dixie-net.com)

A man is 24 years older than his son. In two years, his age will be twice the age of his... (answered by mananth)