G built a rectangular pen such that the length is 7 ft less than twice the width. If the perimeter is 40 ft, what are the dimensions?
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1 Answer

rektangel

leng=2*wide -7

rim leng=40, so half rim=20

leng+wide=20

(2*wide -7) +wide=20

3*wide-7=20

3*wide=27

wide=9

leng=20-9=11
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