SOLUTION: elsie is twelve years old than her brother andy. four years from now andy will be two third as old as elsie. how old are they now?

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Question 370657: elsie is twelve years old than her brother andy. four years from now andy will be two third as old as elsie. how old are they now?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
andy = a
elsie= a+12. Four yrs from now, andy = a+4, elsie = a+16.
a%2B4+=+%282%2F3%29%28a%2B16%29,
3a+12 = 2a + 32,
a = 20, the age of andy, and
a + 12 = 32, the age of elsie.