Let the total ribbon Zoe had was x feet.
Out of x feet, she used 3/8 part of it.
Hence, [tex]\frac{3x}{8}[/tex]
3/8 part of the original ribbon is equal to 9 feet.
Hence, we get
[tex]\frac{3x}{8} = 9[/tex]
=> Multiply 8 on both sides.
[tex]3x=72[/tex]
Divide both sides by 3
[tex]\frac{3x}{3}=\frac{72}{3}[/tex]
[tex]x=24 ft[/tex]
Zoe had 24 feet of ribbon in starting... Answer
