To find the possible age of the Spanish teacher, we can let \( x \) represent the teacher's age. According to the problem, if the students find the product of the teacher's age and 3, that product should be a minimum of 78. We can express this relationship with the following inequality:
\[ 3x \geq 78 \]
To find the minimum age of the teacher, we can solve for \( x \):
- Divide both sides of the inequality by 3:
\[ x \geq \frac{78}{3} \]
- Calculate the right-hand side:
\[ x \geq 26 \]
Thus, the possible ages of the Spanish teacher must be 26 years or older.