Final answer:
If the airplane has 90 seats on both the left and right sides, then the total number of seats would be 180.
Step-by-step explanation:
The question seems to ask about the total number of seats in an airplane, given that there are 90 seats on the right side. However, the information about the left side of the plane is unclear due to the typos.
Assuming the airplane is symmetrical and there are also 90 seats on the left side, the total number of seats would be the sum of seats on both sides. For example, if there are 90 seats on the right side and also 90 seats on the left side, then the total number of seats in the airplane would be:
Total number of seats = seats on the left side + seats on the right side
Total number of seats = 90 + 90
Total number of seats = 180
Therefore, the airplane would have 180 seats in total.