Answer:
For 10 tickets.
Step-by-step explanation:
Let for x tickets the cost the same for club member & non-members,
For club member,
Membership fee = $ 30,
Ticket price per person = $ 3,'
Thus, the total cost for x tickets = 30 + 3x,
For non-members,
Membership fee = $ 0,
Ticket price per person = $ 6,
Thus, the total cost for x tickets = 0 + 6x,
![\implies 30 + 3x = 0 + 6x](https://tex.z-dn.net/?f=%5Cimplies%2030%20%2B%203x%20%3D%200%20%2B%206x)
![30 = 6x - 3x](https://tex.z-dn.net/?f=30%20%3D%206x%20-%203x)
![30=3x](https://tex.z-dn.net/?f=30%3D3x)
![\implies x = \frac{30}{3} = 10](https://tex.z-dn.net/?f=%5Cimplies%20x%20%3D%20%5Cfrac%7B30%7D%7B3%7D%20%3D%2010)
Hence, for 10 tickets the cost the same for club member & non-members.