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posted by teresa on Wednesday, September 15, 2010 at 12:45am.

two sisters together have 20 books. if the younger sister lost 3 books and the older sister doubled the number she has, they would have a total of 30 books. How many books does each have?

The older has 26 and the younger 4

Now: older sister --- x younger sister --- 20-x new scenario: older sister --- 2x younger --- 20-x - 3 = 17-x 2x + 17-x = 30 x = 13 so now the older has 13, the younger has 7

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