Mr. Kohl has a beaker containing n milliliters of
solution to distribute to the students in his chemistry
class. If he gives each student 3 milliliters of solution,
he will have 5 milliliters left over. In order to give
each student 4 milliliters of solution, he will need an
additional 21 milliliters. How many students are in
the class?
A) 16
B) 21
C) 23
D) 26