x +y = 25
55x +65y=1575
1) Gathering the data
x general ticket $ 55
y- vip ticket $65
Total of 25 tickets
Total Revenue= 1575
x +y =25 Relates how many tickets were sold
55x +65y= 1575 Relates the price of each kind of ticket and their revenue.
2) So the answer is
x +y = 25
55x +65y=1575