Question 57328
2s+3.5a = 3825
s+a = 1500

2s+3.5a = 3825	1.5a = 825		
2s+2a = 3000	1.5a/1.5 = 825/1.5	a = 550

Sub In

2s+3.5(550) = 3825
2s+1925 = 3825
2s = 1900
s = 950

Sub In Again
950+550 = 1500
1500 = 1500

Therefore, 550 adult tickets & 950 student tickets were purchased.

J-Man