SOLUTION: Peter is forty years old and his son is ten years old. How long will it take so that will Peter be twice as old as his son?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: Peter is forty years old and his son is ten years old. How long will it take so that will Peter be twice as old as his son?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1188489: Peter is forty years old and his son is ten years old. How long will it take so that will Peter be twice as old as his son?
Found 2 solutions by ikleyn, Alan3354:
Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
.

Let x be the number of years to pass.


Then your basic equation is this

    40 + x = 2*(10+x)


Simplify and find x


    40 + x = 20 + 2x

    40 - 20 = 2x - x

      20    =    x


ANSWER.  In 20 years.


CHECK.  In 20 years their ages will be  10+20 = 30 (the son)  and  40 + 20 = 60  (the father).

Solved.



Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Peter is forty years old and his son is ten years old. How long will it take so that will Peter be twice as old as his son?
--------------
The difference remains 30 years.
---> ages 30 and 60