Question

If 1/2 the students go to the library and another 1/2 go to the computer lab. If 8 students are left in the class now how many students were in the class originally

Answer 1

So you're trying to find the total number of students,
There are 8 left, and they have been halved 2 times
8 x 2 = 16
16 x 2 = 32
Multiply by 2 because x2 is the opposite of x$\frac{1}{2}$
32 students total

Answer 2

32 students, 8+8+16=32