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13 February, 05:06

Suppose tom has 23 coins totaling $4.25. if he has only dimes and quarters, how many of each type does he have?

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  1. 13 February, 06:29
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    Suppose Tom has d dimes and q quarters.

    total number of coins: d+q=23

    total amount of money: 10d+25q=425

    multiply the first equation by 10: 10d+10q=230

    subtract the new equation from the second equation: 25q-10q=425-230,

    15q=195

    q=13

    d=23-13=10

    Tom has 10 dimes and 13 quarters.
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