Freeform quiz with multiple answers

Hi all!

I am building a math course and want to incorporate self checks throughout the course.  I built the attached freeform quiz slide to accommodate this idea. However, when I change the answer in one text entry box, it changes the answer in all the text entry boxes.  For example, if I have an equation for the students to solve, let's say 3(2x + 4) = 24.  The steps the student needs to take to solve are as follows:

3(2x + 4) = 24

6x + 12 = 24

6x = 12

x = 4

For each of the last 3 steps, I would insert a text entry box. When the student finished, they would hit the submit button and receive feedback.  However, as you can see in the attached slide, when I change the answer in one text entry box, it changes the answer in all the text entry boxes.

Any help/feedback/corrections would be appreciated.

Thanks,

Elaine