Question 1063449
Let m be the amount of tickets sold at $10, and n be the amount sold at $8. Then:
m+n=2825
10m+8n=25898
8m+8n=22600
2m=3298
m=1649
n=2825-1649=1176
1649 tickets were sold at the door, and 1176 were sold in advance. ☺☺☺☺