Question

Question 9

A roller coaster has 4 cars, each with the same number of seats. There are 21 passengers seated in
the roller coaster, but 3 seats are empty. Write an equation that can be used to determine the
number of seats in each car.

Answer 1

`4n = 24`

Explanation:

Given

`Cars = 4`

`Empty = 3`

`Occupied = 21`

Required

Determine an equation to find number of seats

Let the number of seats in each car be represented by n;

If
`1\ car = n`

Then:

`4\ cars = 4 * n`

`4\ cars = 4 n`

This implies that there are 4n total seats

Solving further:

`Occupied\ Seats + Empty\ Seats = Total`

Substitute values for the above parameters:

`21 + 3 = 4n`

`24 = 4n`

Reorder

`4n = 24` ---- This equation can be used to solve for n