A college has two classrooms of students
Classroom A had 70 students and Classroom B had 30 students.
Classroom A sent groups of 4 students to Classroom B until both classrooms had the same number of students.
The equation shown can be used to find the number of groups that Classroom A sent to Classroom B so each classroom had the same number of students.
How many groups did Classroom A send to Classroom B?