intermediate algebra

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A business executive bought 40 stamps for $13.68. The purchase included 37 cents stamps and 23 cents stamps. How many of each type of stamp were bought?

  • intermediate algebra -

    x + y = 40 (number of stamps)
    23 x + 37 y = 1368 (number of cents)

    Solve for x and y

    23 (40 -y) + 37 y = 1368

    Now you only have to solve for y

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