Answer:
Number of Adult's tickets sold on Saturday = 3,356
Number of Children's tickets sold on Saturday = 2, 928
Total number of tickets sold over these two days is 8,938.
Step-by-step explanation:
Here, the number of tickets sold on FRIDAY:
Adult Ticket sold = 1,678
Children's Tickets sold = 976
So, the total number of tickets sold on Friday Â
= Sum of ( Adult + Children's ) tickets  = 1,678  + 976 = 2,654 ....  (1)
The number of tickets sold on SATURDAY:
Adult Ticket sold =  2 times  the number of adult tickets sold on Friday Â
               =  1,678 x 2  = 3,356
Children's Tickets sold = 3 x the number of children's tickets sold on Friday.
                   =  976  x 3 = 2, 928
So, the total number of tickets sold on Saturday Â
= Sum of ( Adult + Children's ) tickets  = 3,356 + 2,928 = 6, 284 ....  (2)
Now, the total number of tickets booked in these two days :
Sum of tickets booked on (Friday + Saturday)
= 2,654 + Â 6, 284 Â = Â 8,938
Hence, total number of tickets sold over these two days is 8,938