Just as an example, my backpack, tent, sleeping bag and pad all together weigh less than your backpack alone. And my pack weight (base weight without food, fuel, water is 14-15 lbs/16.8 kg) is, I believe, one of the heavier ones on this forum!
You'll find lots of ideas here for lightening your load, and you'll enjoy your backpacking a lot more! You might want to start with this article: http://www.backpackinglight.com/cgi-bin/backpackinglight/00034.html
It's relatively old, yes, but the advice is still good!
Edit: More good articles on lightening up here, listed in the left hand column: http://www.backpacking.net/