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13 July, 23:21

In geotown, there are 210 teenagers that own a tablet. This is at least 4/5 of all teenagers that live in geotown. What is the maximum number of teenagers who live in geotown?

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  1. 13 July, 23:36
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    Let x = the number of teenagers in Geotown.

    At least 4/5 of x equals 210. Therefore

    (4/5) x ≥ 210

    Multiply each side by 5.

    4x ≥ 210*5 = 1050

    x ≥ 1050/4 = 262.5

    Because x ≥ 262.5, therefore x = 263 (x must be an integer).

    Answer: 263
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