Let \( t \) be the total number of students in Ms. Garcia's class. According to the problem, two-thirds of the class own a pet, and this number is given as 8 students.
We can model this with the equation:
\[ \frac{2}{3} t = 8 \]
To find \( t \), we can solve for \( t \):
- Multiply both sides by \( 3 \):
\[ 2t = 24 \]
- Now, divide both sides by \( 2 \):
\[ t = 12 \]
Thus, the completed equation that models the total number of students, \( t \), in Ms. Garcia's class is:
\[ t = 12 \]