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A 189 square foot rectangular office has a length of 21 feet. What is the width of the office?
We have formual for area of rectangle A=l*w where l is length and w is width. We can transform it to obtain width A=l*w /:l (divide both sides by l) [tex] \frac{A}{l}=w [/tex] Knowing that A=189 and l=21 we can substitute our data to the formula w=[tex] \frac{189}{21}= 9[/tex] - its the result
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