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30 April, 18:02

Mary and her brother John collect foreign coins. Mary has three times the number of coins that John has. Together they have 140 foreign coins.

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  1. 30 April, 20:47
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    Mary has 3x coins, John has x coins,

    x+3x=140.

    4x=140

    x=140/4

    x=35

    John has 35 coins and Mary has 105 coins.
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