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"L + W = 27"

How did you obtain the 27?

Answer I have is 6 feet by 21 feet.

Thanks again.

"A rectangular flower bed has a perimeter of 54 feet."

perimeter = 2L + 2W

2L + 2W = 54 ft

L + W = 27 ft

:::::

"Answer I have is 6 feet by 21 feet."

Okay, I misinterpreted the question, thinking that all eight beds were consolidated into one large bed.

The additional seven beds are consolidated into a bed that is separate from the original:

https://www.flickr.com/photos/dwread/13980952741/

"7 additional beds were placed side by side next to the first bed."

Dimensions of the new bed: L by 7W

"The new bed is twice as long as the original bed."

7W = 2L

Substitution

7(27 - L) = 2L

189 - 7L = 2L

9L = 189

L = 21 ft

W = 27 - L = 6 ft

Sorry for my error.

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