To find the number of coupons that were not used, you can subtract the number of coupons that were redeemed from the total number of coupons distributed.
Total coupons distributed = 7,000
Coupons redeemed = 3,290
Coupons not used = Total coupons - Coupons redeemed
Coupons not used = 7,000 - 3,290
Coupons not used = 3,710
So, the answer is 3,710.