SOLUTION: The height of the bookcase is 3 feet longer than the length of the shelf. If 18 feet of lumber is available for the entire unit, find the length and height of the unit.

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Question 1085293: The height of the bookcase is 3 feet longer than the length of the shelf. If 18 feet of lumber is available for the entire unit, find the length and height of the unit.
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
18 feet of lumber available = perimeter

x = length

2(x) + 2(x+3) = 18
4x + 6 = 18
4x = 12
x = 3

The bookshelf is 3 feet long and 6 feet high.