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1 September, 13:11

The length of a rectangle is three more than its width. The perimeter is 86cm. Find the length and width of the rectangle. Write an equation and solve

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  1. 1 September, 13:20
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    P=2 (l+w)

    Substitute width plus 3 for length

    Remember order of operations: multiply before adding

    86=2 ((w+3) + w)

    86=2w+6+2w

    86=4w+6

    80=4w

    20=w

    23=w+3=l

    Check the answer

    86=2 ((w+3) + w)

    86=2 ((20+3) + 20

    86=2 (23+20)

    86=46+40

    86=86
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