We already know he paid $2 to use the printer, so you have your first equation: $8.93 - $2.00 = $6.98.
He has to pay $0.99 for each copy he prints.
You just need to multiply $0.99 by however many times it takes to get close enough to $6.98.
When I did that, I got 7.
7 was the closest answer I got. So Jerry made 7 copies of paper or printed 7 pages.