SOLUTION: Andrew is three years older than Mary. if the sum of their ages total 27. How old is Mary

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Question 1084850: Andrew is three years older than Mary. if the sum of their ages total 27. How old is Mary
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=3%2BM
and
A%2BM=27
Substituting,
%283%2BM%29%2BM=27
2M%2B3=27
2M=24
Solve for M then use either equation to solve for A.