SOLUTION: Castro is three years older than Sam, Allan is two years older than Sam. If the sum of their age is 20. How old are they now?

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Question 1165541: Castro is three years older than Sam, Allan is two years older than Sam. If the sum of their age is 20. How old are they now?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Castro         m+3
Sam            m
Allen          m+2
SUM            20