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20-11-2018
Mathematics

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The length of a rectangle is 9 less than 4 less than the width. The perimeter is 143. Find the width and length.

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mynkiran mynkiran

25-11-2018

The formula for perimeter is 2l+2w. Since we know l=(w-4)-9, we can substitute this into the formula.

l=w-13

2(w-13)+2w=143

2w-26+2w=143

4w=169

w=42.25 units

Hope this helps!

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