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 = 5x
The number of students in 5 buses + The number of students in a car = Total number of students
⇒5x+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.
5x+7−7=31−7 5x=25
Step 2: Now, divide both sides by 5 to eliminate 5 on the left side of the equation.
5x5=255 x=5
Hence, 5 students were there in each bus.