Question

PLEASE HELP, EXTRA CREDIT AND I NEED IT!

A teacher usually divides his class into six groups of "n" students each. However, on Monday, three of the students were absent, so the teacher divided the remaining students into seven groups of "m" students each. On Tuesday, four students were absent, so he went back to "n" students per group, but there were only five groups. How many students are in the class?

Answer 1

6n-4=5n
six groups of n students, minus four students (absent on Tuesday) is equal to 5 groups of n students.

Answer 2

Thank you. I really needed it. c:

Answer 3

so if you solve the equation, he has 24 students. we can check by plugging 24 into the problem.
usually: 24 can be divided into 6 and will leave 4 students per group.
Monday: 3 students were absent, leaving 21, which can divide evenly into 7 groups of 3 students.
Tuesday:20 can be divided by 5 evenly (:

Answer 4

no problem (: