In a group of 60 students, 12 students take algebra i, 18 students take algebra ii, and 8 students take both subjects. how many students don't take either of these subjects?
a. 26
b. 38
c. 42
d. 22

Since 8 students take both, that leaves only 4 students who take Algebra I alone.
Likewise since 8 students take both, that leaves 10 who only take Algebra 2
So out of the 60, twenty two are taking either Alg I Alg Ii or both.

That leaves 38 people who are not taking either.
b. 38

You can set this up using a 2 circle venn diagram.  Just be sure to put the 8 who take both in first.

X> -2 is the simplified version.