Answer:
200 tickets
Explanation:
Let x represent the number of tickets sold before the game
Let y represent the number of tickets sold on the day of the game
x + y= 600
x= 600-y............equation 1
2.50x + 3.75y= 1750.......equation 2
Substitute 600-y for x in equation 2
2.50(600-y) + 3.75y= 1750
1500 - 2.50y+ 3.75y= 1750
1500 + 1.25y= 1750
1.25y= 1750-1500
1.25y= 250
y= 250/1.25
y = 200
Hence 200 tickets were sold at the gate for this game