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5 September, 07:41

Cody was 165cm y'all on the first day of school this year, which was 10% taller than he was on the first day of school last year. How tall was Cody on the first day of school last year?

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  1. 5 September, 11:14
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    Solution:

    Let

    X = height of Cody on the first day of school last year

    Given:

    Y = height of Cody on the first day of school year = 165 cm

    10% (X) + X=Y

    .10 (X) + X=165

    1.10X=165

    X=165/1.1

    X=

    150 cm = height of Cody on the first day of school last year
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