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29 January, 18:23

A bookstore sold 18,000 paperbacks one month. This was 10% less than the number of paperbacks the store sold the previous month. The following equation represents this situation, where x represents the number of paperbacks sold the previous month.

x - 0.1x = 18,000

How many paperbacks did the store sell in both months combined?

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  1. 29 January, 21:38
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    The answer is $38,000

    (1) Calculate how many paperbacks are sold the previous month:

    x - 0.1x = 18000

    1x - 0.1x = 18000

    0.9x = 18000

    x = 18000 / 0.9

    x = 20000

    (2) Sum up the number of paperbacks sold in both months:

    18000 + 20000 = 38000
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