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gianellelol

  • 4 years ago

Earl has 28 coins, all dimes and quarters. How many of each does he have, if their total value is $5.20?

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  1. mr.luna
    • 4 years ago
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    d+q=5.20 .10d+.25q=5.20 sub method

  2. mr.luna
    • 4 years ago
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    wait! d+q=28 sorry

  3. mr.luna
    • 4 years ago
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    now you sub. lets do dimes. d=28-q so sub it .10(28-q)+.25q=5.20 2.80-.10q+.25q=5.20 .15q=2.40 q=16 soooo then dimes is 12

  4. mr.luna
    • 4 years ago
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    does that make sense?

  5. gianellelol
    • 4 years ago
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    yes, thank u

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