SOLUTION: Derek is four times as old as his brother.Five years ago,the sum of their ages was equal to derek's present age,How old is derek and his brother"

Question 666033: Derek is four times as old as his brother.Five years ago,the sum of their ages was equal to derek's present age,How old is derek and his brother"
Found 2 solutions by josmiceli, bloggauta:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Derek's age now
Let = Brother's age now
------------
given:
(1)
(2)
----------------------
(2)
(2)
and
(1)
(1)
Derek is 40 and his Brother is 10

Answer by bloggauta(8) (Show Source): You can put this solution on YOUR website!
"Derek is four times as old as his brother" → D= 4B
"Five years ago,the sum of their ages was equal to derek's present age" → (D-5)+(B-5)=D
► B= 10 then D= 40
Derek is 40 years old and his brother is 5 years old
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