Answer:
26
Step-by-step explanation:
We assume they gave away all 78 tickets.
They gave away x tickets to employees.
Then the number of tickets they gave to listeners is 2x.
Altogether they gave away x + 2x = 3x tickets.
They gave away 78 tickets, so we get the equation
3x = 78
3x/3 = 78/3
x = 26
Answer: 26