Use of hidden sink

I have a “math response” with this code of …

showSubmitButton: this.submitCount<1
disableEdit: not(this.submitCount=0)

if response is false I would like a second “math response” (in other words a second attempt) to appear, otherwise I want it hidden if first response is true. What does the hidden sink look like?

I have this hidden code for the second “math response” as…

hidden: when not(system2.submitted) true otherwise false

which causes the second “math response” to appear regardless of first “math response” entry

Hello …
here’s a basic idea of how to make it work:
https://teacher.desmos.com/activitybuilder/custom/679b9edb9cc39a6c13bc1698

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