Final answer:
The equation representing the total number of girls students is 3x = 36.
Step-by-step explanation:
Let the number of boys be x. According to the question, the number of girls is two times the number of boys, so the number of girls would be 2x.
The total number of students in the class is 36, so the equation representing the total number of girls students would be: 2x + x = 36.
Simplifying the equation, we get 3x = 36.
Thus, the equation representing the total number of girls students is 3x = 36.
Learn more about Representing equations with variables