An exercise contains at least an instruction and an interaction.

Let’s create a basic exercise with an Algebra interaction. Create a new exercise and choose the audience.

Define the **instruction** for the student in the question field. In our example we want the student to solve the equation a^2+a-20=0. Use the f(x) button to include the math expressions.

Insert the interaction **I1** as block interaction using the **plus** button below the instruction.

The result should be as follows:

Now the structure of the exercise is done, let’s define the **interaction**.

## A basic algebra interaction

We are going to create an interaction to let the student solve the equation a^2+a-20=0.

Select Algebra from the list of available interactions and click **Select.** A Task window appears.

Click on the text **Click to define…** to start editing the task.

Click on the dropdown list after **Task**.

Select **Solving equations** and edit the input fields.

This is all that’s needed to define this interaction. AlgebraKiT will automatically generate the worked solution, hints, and expected answers from this task.

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Once you have added both question and interaction, you can click **Run** and test your basic exercise.

You will see a pop-up, where AlgebraKiT asks you to confirm that symbol *a* is a variable.

We will return to the interpretation of symbols later in this tutorial. For now, you can click **Confirm and add to the symbols list**.

You will see the interaction on the left and the worked solution on the right, as shown below. Click to activate and test them.

Now **Save** your exercise.

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