SOLUTION: the sum of age of a man and his son is 100 yrs. 30 yrs ago the man was three times as old as his son. find the age of his son at present?
Algebra.Com
Question 311489: the sum of age of a man and his son is 100 yrs. 30 yrs ago the man was three times as old as his son. find the age of his son at present?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
represent the age of the father. Let 
represent the age of the son. Then
and
)
Solve the first equation for y:
Substitute:
\ -\ 30\right))
Just solve for . The other value follows directly.
John
RELATED QUESTIONS
two years ago,a man was five times as old as his son. two years later,his age be 8 more... (answered by JulietG)
in 12 yrs a man will be 3 times as old as his son,the difference of their present age is... (answered by checkley79)
Two years ago, a man was five times as old as his son. Two years later, his age will be 8 (answered by josmiceli)
PLS. HELP ME WITH THIS problemS. ASAP
~peter's age 13 yrs. ago of his age was 1/3 of... (answered by ankor@dixie-net.com)
A father is 3 times as old as his son and his daughter is 3yrs younger than the son. If... (answered by ikleyn)
A man is 5 times as old as his son, 2 years ago the sum of square of their ages was 114,... (answered by Alan3354)
five years ago, a man was five times as old as his son. two years hence, the man will we... (answered by lwsshak3,MathTherapy)
Two years ago, a man was 7 times as old as his son. In 3 years time, he will be only 4... (answered by Menjax)
A man is three times as old as his son and six years ago the product of their age was... (answered by ptaylor)