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15 January, 14:15

Teh width of a rectangle is 2 cm less than 7 times the length. the perimeter is 60 cm. determine the length and the width of the rectangle

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  1. 15 January, 14:21
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    P=2 (L+W)

    60=P=2 (L+W)

    60=2 (L+W)

    divide by 2

    30=L+W

    given

    W=-2+7L

    subsitute

    30=L+W

    30=L-2+7L

    30=8L-2

    add 2

    32=8L

    divide by 8

    4=L

    sub back

    W=-2+7L

    W=-2+7 (4)

    W=-2+28

    W=26

    width is 26cm

    length is 4cm
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