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23 May, 22:22

Mary and her brother John collect foreign coins. Mary has four times the number of coins that John has. Together they have 200 foreign coins.

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  1. 23 May, 22:47
    0
    x + 4x = 150

    5x = 150

    x = 30

    John has x = 30 coins

    Mary has 4x = 4*30 = 120 coins. Let the number of coins John has be "x".

    The the number of coins Mary has is "4x"
  2. 24 May, 01:53
    0
    John has 40 coin and Mary has 160 coins because 40 times 4 equals 160 and 160 plus 40 equals 200 so Mary has 160 and John has 40
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