SOLUTION: A man is 8 times as old as his son. In five years time he will be only four times as old. How old is the son now ?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: A man is 8 times as old as his son. In five years time he will be only four times as old. How old is the son now ?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 306872: A man is 8 times as old as his son. In five years time he will be only four times as old. How old is the son now ?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
M=8S
M+5=4(S+5)
8S+5=4S+20
4S=15
S=15/4
M=8(15/4)
M=2(15)
M=30 yo
S=3 3/4 yo or 3.75yo