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Posted by **ssssss** on Monday, April 16, 2012 at 5:28am.

- maths -
**Reiny**, Monday, April 16, 2012 at 8:26amnumber of 25 cent coins --- x

number of 50 cent coins ---- 24-x

25x + 50(24-x) = 690

solve for x and back-substitute

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