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Mathematics, 24.08.2019 14:30 rosefoley18

Mr yang’s son has a total of twenty-one $1 and $2 coins in his money box. when he counts his money, he finds that its total value is $30. how many coins of each type does he have?

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Mr yang’s son has a total of twenty-one $1 and $2 coins in his money box. when he counts his money,...
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