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17 March, 23:21

Given: AB = 3y - 1, BC = 7y, AC = 29 Prove: AB = 8

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  1. 18 March, 01:08
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    AB + BC = AC

    3y - 1 + 7y = 29

    10y - 1 = 29

    10y = 29 + 1 = 30

    y = 30/10 = 3

    AB = 3 (3) - 1 = 9 - 1 = 8
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