SOLUTION: jack is twice as old as mary. three years ago, the sim of their ages was 57. how old are jack and mary?

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Question 1145731: jack is twice as old as mary. three years ago, the sim of their ages was 57. how old are jack and mary?
Answer by ikleyn(52810) About Me  (Show Source):
You can put this solution on YOUR website!
.

Right now the sum of their ages is 57 + 2*3 = 63.


Since J is twice as old as M,   Mary is 63/3 = 21 years old and Jack is 42 years old.    ANSWER


Solved.

This problem is for mental solution.