Given:
Admission to a baseball game is $4.00 for general admission and $5.50 for reserved seats.
Let the number of tickets of general admission = x
Let the number of tickets of reserved seats = y
The receipts were $5196.50 ⇒ 4x + 5.5y = 5196.50
The paid admissions 1181 ⇒ x + y = 1181
So, we have the following system of equations:

Substitute with x from (3) into (1) then solve to find y

Substitute with y into equation 3 to find x:

So, the answer will be:
The number of tickets of general admission = 866
The number of tickets of reserved seats = 315