# Pull a student equation from one slide into another

**URL:** <https://cl.desmos.com/t/pull-a-student-equation-from-one-slide-into-another/1983>\
**Category:** Questions\
**Created:** [November 19, 2020, 7:07pm UTC](https://cl.desmos.com/t/pull-a-student-equation-from-one-slide-into-another/1983 "2020-11-19T19:07:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Matt\_DeGilio](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/matt_degilio/32/1330_2.png) [@Matt\_DeGilio](https://cl.desmos.com/u/Matt_DeGilio)\
**Post date:** [November 19, 2020, 7:07pm UTC](https://cl.desmos.com/t/pull-a-student-equation-from-one-slide-into-another/1983/1 "2020-11-19T19:07:29Z")

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So I will start this off with there is no concrete reason I need to do this other than I am just trying to see what I can do with Desmos.

On one slide I have students turning words into an expression (i.e three times a numer plus 3 is 9) , I have the students typing the expression into a math input. On the next slide I would like to have desmos pull the equation they wrote and have them solve it, ideally the slide would show the equation they typed previously.

I hope that all makes sense and any help would be great.

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**Author:** ![Daniel\_Grubbs](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/daniel_grubbs/32/719_2.png) [@Daniel\_Grubbs](https://cl.desmos.com/u/Daniel_Grubbs)\
**Post date:** [November 19, 2020, 9:03pm UTC](https://cl.desmos.com/t/pull-a-student-equation-from-one-slide-into-another/1983/2 "2020-11-19T21:03:53Z")

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How’s this? This will only register correct on the second slide if the initial equation was correct, but you could use a graph to correct any equation a student gives and solves.

Also, the student must use n here, so you may want to specify to use n. However, you could add more parameters to `differenceFunction` and `evaluateAt`, but that gets a little messy in the code.

> **[Solving Student Equation • Activity Builder by Desmos](https://teacher.desmos.com/activitybuilder/custom/5fb6c63272373e0d248ac1ba)**
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> by Daniel Grubbs

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<div class="post-metadata">

**Author:** ![Matt\_DeGilio](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/matt_degilio/32/1330_2.png) [@Matt\_DeGilio](https://cl.desmos.com/u/Matt_DeGilio)\
**Post date:** [November 19, 2020, 11:36pm UTC](https://cl.desmos.com/t/pull-a-student-equation-from-one-slide-into-another/1983/3 "2020-11-19T23:36:03Z")

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Yes this is perfect thank you!

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**Author:** ![Nicolas\_Lobotsky](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/nicolas_lobotsky/32/1670_2.png) [@Nicolas\_Lobotsky](https://cl.desmos.com/u/Nicolas_Lobotsky)\
**Post date:** [December 2, 2020, 10:36am UTC](https://cl.desmos.com/t/pull-a-student-equation-from-one-slide-into-another/1983/4 "2020-12-02T10:36:39Z")

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I did not create this set of slides, only modified it, so I can not take credit for the coding but slide 4 has another method.

> **[Practice Problems Open Up Lesson 2.09 • Activity Builder by Desmos](https://teacher.desmos.com/activitybuilder/custom/5f999e74f2788b0ce60de895?collections=5f99d4d46a861b0c7f447441)**
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> by Nicolas Lobotsky