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Half the perimeter of a garden is 18 feet. The garden is 8 feet longer than it is wide. If W= the width in feet and I= the length in feet, which system must be true?

a.) 1/2(l+w)=18
l=w+8

b.) 1/2(l+w)=18
w=l+8

c.) l+w=8
l-w=18

d.) l-w=8
l+w=18

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