Q: All of my pictures from my PC are on my iphone how do i delete them

Delete them by using iTunes to sync again but change the selection on the Photos page of iTunes. See the instructions below from Sync photos from your computer to your iOS device using iTunes - Apple Support

1 In iTunes, locate and click on your device.

2 Click Photos.

3 Choose "Selected albums" and deselect the albums or collections you want to delete.

4 To delete all synced photos, deselect "Sync Photos from" and, when asked, click "Remove photos."

5 Click Apply.