On an airplane, there are 2 seats on the left side of each row and 3 seats on the right side of each row. There are 90 seats in the right side of the plane.

a. How many seats are in the left side of the plane?

b. How many seats are there altogether?

Question A:

If you take 90 and 3 and divide them, you will get 30. This means that there are 30 rows on the right side of the plane.

Now all you have to do is simply multiply 30 and 2 to get the number of seats on the left side ...

30 * 2 = 60

Answer: There are 60 seats on the left side of the plane

Question B:

To find the amount of seats all together, simply add 90 and 60 ...

90 + 60 = 150

Answer: 150 seats