Answer : The number of tickets sold at the door were, 88 tickets
Step-by-step explanation :
As we are given that the cost of school play tickets in advance is $4 and at the door is $5. Total cost of ticket sales for an evening production were, $440.
Let the number of tickets sold at the door be, x
So, The equation will be:



Thus, the number of tickets sold at the door were, 88 tickets