SOLUTION: I am three times as old as my brother. Five years later I shall be two and a half times as old as my brother. How old am I and how old is my brother?

Question 1098043: I am three times as old as my brother. Five years later I shall be two and a half times as old as my brother. How old am I and how old is my brother?
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!

-----------Brother is 15.
-
-----------Other person's age, 45.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = my age now
Let = my brother's age now
------------------------------------
(1)
(2)
------------------------------
Multiply both sides of (2) by
(2)
(2)
Plug (1) into (2)
(2)
(2)
(2)
and
(1)
(1)
(1)
--------------------
I an 45 and my brother is 15
------------------------------
check:
I am 3 times as old as my brother TRUE
(2)
(2)
(2)
(2)
(2)
OK

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