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20 July, 12:55

Ian has 10 fewer dimes than quarters. He has 5.30. Find the number of quarters and dimes Ian has.

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Answers (2)
  1. 20 July, 14:29
    0
    0.10d + 0.25q = 5.30

    d = q - 10

    0.10 (q - 10) + 0.25q = 5.30

    0.10q - 1 + 0.25q = 5.30

    0.10q + 0.25q = 5.30 + 1

    0.35q = 6.30

    q = 6.30/0.35

    q = 18

    d = q - 10

    d = 18 - 10

    d = 8

    Ian has 8 dimes (d) and 18 quarters (q)
  2. 20 July, 14:33
    0
    8 quarters 18 dimes
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