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Coin exchange system of equations

1000BeginnerSystems Of EquationsAlgebra

Регионален натпревар по математика за основно образование

A banknote of 100 denars is to be exchanged for coins of 2 and 5 denars, with the total number of coins being 32. If such an exchange exists, how many coins of 2 denars and how many coins of 5 denars are used?
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