![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Let x be the length of a side of the regular octagon.
\The perimeter of a regular octagon is 124 inches.
\The formula for the perimeter of a regular octagon is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5f3c3cc26bfcc352231942c0c81bddf9.png\")
.
Therefore equation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7f860d53d1ba70dd39b32288a7d004ee.png\")
.
Divide each side by 8.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ffd2e7a170d0cd6f81da6a39ddc8e470.png\")
Cancel common terms.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=feb8f92c7f2a4eb0e8519ab6f1768254.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The length of a side of the regular octagon is 15.5 inches.