SOLUTION: Edwin is four times as old as Joshua. In 12 years, Joshua's age will be half that of Edwin's. How old are they?

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Question 1108670: Edwin is four times as old as Joshua. In 12 years, Joshua's
age will be half that of Edwin's. How old are they?
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
Edwin is four times as old as Joshua.
matrix%281%2C5%2CE%2C%22%22%2C%22%22=%22%22%2C%22%22%2C4J%29
In 12 years, Joshua's age will be half that of Edwin's.


From the first equation, substitute 4J for E in the 
second equation.  Solve for J to find Joshua's age.
Then substitute that in E = 4J to find Edwin's age.

Edwin