Answer:
Step-by-step explanation:
Let x represent the arrivals and departures at the third airport. Then the number at the first airport is x+1.7, and the number at the second airport is x+14.1. The total is ...
(x+1.7) + (x+14.1) + (x) = 240.8
3x +15.8 = 240.8
3x = 225
x = 75
x+1.7 = 76.7
x+14.1 = 89.1
The first airport has 76.7 million arrivals.
The second airport has 89.1 million arrivals.
The third airport has 75 million arrivals.