An aluminum brace used to support a wooden shelf has a length that is 3 inches less than twice the width of the shelf. The brace is anchored to the wall 3 inches below the shelf, as shown. Find the width of the shelf and the length of the brace. 
w = __________ in. l = __________ in.
Correct Answer:
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Q13: Perform the indicated operation. Simplify, if
Q14: Multiply, then simplify if possible.
Q15: Perform the operations and simplify the
Q16: Insert either a multiplication symbol .
Q17: The _ of
Q19: Multiply, then simplify if possible.
Q20: Multiply, then simplify if possible.
Q21: Add, and then simplify, if possible.
Q22: Multiply, then simplify if possible.
Q23: Divide, then simplify if possible.
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