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30 March, 07:06

Louis has three more quarters than dimes in his pocket, for a total of $1.80. Which equation could be used to determine the number of dimes, x, in his pocket?

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  1. 30 March, 07:27
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    Number of dimes: x

    Number of quarters: x + 3

    Answer:

    B) 0.10 x + 0.25 (x + 3) = $1.80

    Also we can solve this equation:

    0.10 x + 0.25 x + 0.75 = 1.80

    0.35 x = 1.80 - 0.75

    0.35 x = 1.05

    x = 1.05 : 0.35

    x = 3, x + 3 = 6

    He has 6 quarters and 3 dimes.

    (6 * 0.25 + 3 * 0.10 = 1.50 + 0.30 = $1.80 - correct)
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