Answer:
45 - 5 = 4n
Step-by-step explanation:
Because the 5 late guests are late and are seated at the small table, we subtract them from the equation from everyone at the large tables, 45 - 5 to get 40 left. As an equal number of guests are seated at the large tables, we divide 40 by 4, to get n = 10 people at every table.