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OpenStudy (anonymous):
HELP PLEASE !!! Ill give a medal !!! Write a system of equations to model each situation. 1. Ten years from now. A will be twice as old as B. Five years ago, A was three times as old as B. What are the present ages of A and B? 2. A change purse contains a total of 100 nickels and dimes. The total value of the coins is $7. How many coins of each type does the purse contain?
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