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December 20, 2014

Homework Help: algebra

Posted by Sue on Monday, November 26, 2012 at 11:46am.

Adam is 3 times as old as Cynthia and Fred is 16 years younger than adam. One year ago, Adam's age was twice the sum of Cythia and Freds age. Find the present ages.
I have
a=3c f=a-16 a-1=2(c-1 + f-1)

and I don't understand what comes next and why

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