I've been working this in my head, and I think I got it, but I need to write it down and get some feedback, so here goes.
Starting with 3 gallons of apple juice, Gravity 1.050
Add enough sugar to get approximately 12% ABV, Gravity now 1.092.
Ferment to dry, Gravity 1.000
Now here's the question... If I add / backsweeten the fermented 3 gallons with 3 more gallons of apple juice at Gravity 1.050, will I now have 6 gallons of cider at Gravity 1.025, and approx 6% ABV?