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The length of a rectangle is 4 ft less than three times the width, and the area of the rectangle is 55 ft2. Find the dimensions of the rectangle.

 Apr 11, 2020
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Let the length and with be l and w, respectivly.

l=3w-4

lw=55

Substitute for l

 

(3w-4)w=55

Looking at 55, an obvious factor pair is 5 and 11. This works.

w=5 and l=11

 Apr 11, 2020

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