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13 May, 08:15

Giuliana has 22 quarters and dollar coins worth a total of $10.75.

Which equation can be used to find d, the number of dollar coins Giuliana has?

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  1. 13 May, 09:23
    0
    Given:

    22 quarters and dollar coins worth 10.75

    quarters = 0.25

    dollar = 1.00

    q + d = 22

    0.25q + d = 10.75

    q = 22 - d

    0.25 (22-d) + d = 10.75

    5.5 - 0.25d + d = 10.75

    0.75d = 10.75 - 5.5

    0.75d = 5.25

    d = 5.25/0.75

    d = 7
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