Math

Sam has a total of 200 dimes and quarters. If the total value of the coins is $28.10, how many quarters does he have?

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  1. what is the value of 200 dimes? Subtract the answer from $28.10. How many quarters in your answer?

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  2. Hmm. Interesting. But if he has 200 dimes, then he would have 0 quarters. I think the interpretation is supposed to be 200 (dimes and quarters), not (200 dimes) and quarters. Besides, you can't make up $8.10 with just quarters.

    How about:

    d+q = 200
    10d+25q = 2810

    d = 146
    q = 54

    check:

    14.60 in dimes + 13.50 in quarters = 28.10

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