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7 November, 01:05

An electrician cuts a 21 ft piece of wire into two pieces. One piece is 13 ft longer than the shorter piece. How long are the pieces?

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  1. 7 November, 04:55
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    X = longer piece, y = shorter piece

    x + y = 21

    x = y + 13

    y + 13 + y = 21

    2y + 13 = 21

    2y = 21 - 13

    2y = 8

    y = 8/2

    y = 4 < = = = shorter piece is 4 ft

    x = y + 13

    x = 4 + 13

    x = 17 < = = longer piece is 17 ft
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