Question
Devon is going to make 3 shelves for her father. He has a piece of lumber 12 feet long. She wants the top shelf to be half a foot shorter than the middle shelf, and the bottom shelf to be half a foot shorter than twice the length of the top shelf. How long will each shelf be if she uses the entire 12 feet of wood?
Answers
oobleck
If the top shelf has length x, then
x + (x + 1/2) + (2x - 1/2) = 12
x + (x + 1/2) + (2x - 1/2) = 12