Delete already imported from iphoto photos on iphone?

So, before I imported a bunch of photos from my iphoto to my iphone. Then after that i reseted my macbook pro which deleted everything but those photos were still on my iphone. I erased and synced everything from my updated mac, but the photos are still there, i tried deleting them, but they don't give me the option to. Also, i would like to know how to delete them, if you say hide them, please tell me a different way then cropping it since i tried that already, and it didn't work. Please help, its taking up so much of my iphone space!

Try this…
- On the Mac in iTunes, select the iPhone icon in the Devices list on the left.
- Click the Photos tab in the resulting window.
- Choose "Sync photos from."
- Choose iPhoto or Aperture from the pop-up menu.
- Choose "Selected albums" and deselect the albums or collections you want to delete.
- Click Apply.

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