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7 August, 22:02

Write a formula for the length l of a rectangle given its perimeter P and its width w. Justify your thinking.

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  1. 7 August, 22:48
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    P = 2l + 2w |subtract 2w from both sides

    2l = P - 2w |divide both sides by 2

    l = (P - 2w) / 2
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