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7 November, 11:40

The length of a rectangle is 3 cm greater than its width. The perimeter is 24 cm. what are the dimensions of the rectangle

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  1. 7 November, 12:50
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    P=2 (L+W)

    P=24

    24=2 (L+W)

    12=L+W

    Length is 3 greater than width

    L=3+W

    subsitute

    12=3+W+W

    12=3+2W

    minus 3

    9=2W

    divide by 2

    4.5=W

    sub back

    L=3+W

    L=3+4.5

    L=7.5

    the rectangle is 7.5cm long and 4.5cm wide
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