You are dividing 130 students into g equally sized group for a field trip, Write a variable expression to find the number in each group.

Question

I know 130/g but what would the formula be for making each group equal.  Thank you in advance.

Answer 1

Let N = the number of students per group

 

Then the equation that would represent the total number of students in the groups is

 

Ng + R = 130

 

where R is the remaining number of students after the groups have been established.  We assume that there are extra students.

 

 

Solving for N,

 

Ng = 130 - R

 

N = (130 - R) / g