Answer
The length is 14 inches
Work Step by Step
We consider the unknown length of the box as $x$ inches. Therefore, one-half the length is $\frac{x}{2}$ inches.
Since the width ($8$ inches) is $1$ inch more than one-half the length, we write the following equation and solve:
$8= \frac{x}{2}+1$
$8-\frac{x}{2}=1$
$\frac{8(2)-x}{2}=1$
$\frac{16-x}{2}=1$
$16-x=2$
$x=16-2$
$x=14$
Therefore, the length is 14 inches.