A group of 31 students made the school trip. There were five buses and a car and the car was filled with 7 students. How many students were on each bus?

4

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Solution

The correct option is C $5$
Given, a total number of students = 31
The number of students in a car = 7
The number of buses = 5

Let the number of students in each bus be $x,$ then the number of students in 5 buses = 5 $x$

The number of students in 5 buses + The number of students in a car = Total number of students
$\Rightarrow 5 x + 7 = 31$

We need to solve $x$ by isolating it to one side of the equation

Step 1: Subtract 7 from both sides of the equation to eliminate the constant on the left side of the equation.
$5 x + 7 - 7 = 31 - 7 5 x = 25$

Step 2: Now, divide both sides by 5 to eliminate 5 on the left side of the equation.
$\frac{5 x}{5} = \frac{25}{5} x = 5$

Hence, 5 students were there in each bus.

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