algebra

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Tristan has $3.75 in quarters and dimes. She has 21 coins. How many of each coin does she have?

  • algebra -

    quarters ---- x
    dimes ------ 21-x

    25x + 10(21-x) = 375
    25x + 210 - 10x = 375
    15x = 165
    x = 11

    Tristan has 11 quarters and 10 dimes

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