To delete extra pages in Excel 2007:

1. Open your Excel spreadsheet and go to the bottom of the page where you see the sheet tabs.
2. Right-click on the sheet tab that you want to delete.
3. Select "Delete" from the drop-down menu.
4. A pop-up window will appear asking if you want to delete the sheet. Click "Delete" to confirm.
5. Repeat steps 2-4 for any additional sheets you want to delete.

If you have a large number of sheets to delete, you can also select multiple sheets at once by holding down the "Ctrl" key on your keyboard while clicking on the sheet tabs. Then, right-click and select "Delete" to delete all selected sheets at once.