Flipo is building a rectangular sandbox for his younger brother.The length of the sandbox is 1 foot longer than twice the width of the sandbox. The perimeter of the sandbox is 29 feet

Answer 1

2 L + 2 w = 29

L = 1 + 2 w
so

2 + 4 w + w = 29

5 w = 27

I have a sneaking suspicion that you have a typo because the text writers always make this stuff come out whole numbers.